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Portwest Thermal Trouser - Navy

Out of Stock

check_boxIn Stock - 122+ available

check_boxIn Stock - 564+ available

check_boxIn Stock - 2,233+ available

check_boxIn Stock - 1,396+ available

check_boxIn Stock - 997+ available

check_boxIn Stock - 476+ available

check_boxIn Stock - 104+ available

hourglass_emptyPre-Order - Stock Due: 04/12/2026

hourglass_emptyPre-Order - Stock Due: 04/12/2026

local_shipping Next Working Day Delivery (if ordered by 3pm) * once in stock Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) Delivery: Next Working Day Delivery (if ordered by 3pm) * once in stock Delivery: Next Working Day Delivery (if ordered by 3pm) * once in stock
  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL
B121NAR B121NARXS B121NARS B121NARM B121NARL B121NARXL B121NARXXL B121NARXXXL B121NAR4XL B121NAR5XL

Quantity prices

Checking quantity prices...

Need a larger quantity? Request a bulk quote →
Colour
XSB121NARXS
£5.83 ex VAT£7.00 inc VAT
122 available
SmallB121NARS
£5.83 ex VAT£7.00 inc VAT
564 available
MediumB121NARM
£5.83 ex VAT£7.00 inc VAT
2233 available
LargeB121NARL
£5.83 ex VAT£7.00 inc VAT
1396 available
XLB121NARXL
£5.83 ex VAT£7.00 inc VAT
997 available
XXLB121NARXXL
£5.83 ex VAT£7.00 inc VAT
476 available
3XLB121NARXXXL
£5.83 ex VAT£7.00 inc VAT
104 available
4XLB121NAR4XL
£5.83 ex VAT£7.00 inc VAT
Pre-Order - due for despatch 04/12/2026
5XLB121NAR5XL
£5.83 ex VAT£7.00 inc VAT
Pre-Order - due for despatch 04/12/2026

Your selection

  • Choose a size to start.
0 units£0.00 ex VAT

Prices per individual item

1 - 4 items
5+ items
£7.00 inc vat
£0.00 inc vat
£5.83 ex vat
£0.00 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat
Out of Stock - Due for despatch 04/12/2026

Prices per individual item

1 - 4 items
5 - 9 items
10+ items
£7.00 inc vat
£6.92 inc vat
£6.85 inc vat
£5.83 ex vat
£5.77 ex vat
£5.71 ex vat
Out of Stock - Due for despatch 04/12/2026
Buying for a team or need a larger quantity? Get a quote for bulk orders, account pricing or branded workwear. Request a business quote →

RELATED PRODUCTS - COMPLETE THE LOOK

PRODUCT & BRAND NOTES

Gold Ecovadis Sustainability Rating 2026

Gold Ecovadis Sustainability Rating 2026

Portwest has been independently rated by Ecovadis for its environmental, social, and ethical performance and achieved a gold rating, meaning they are in the top 5% of globally rated companies.
The pillars taken into consideration include the environment, labour practices and human rights, ethics, and sustainable procurement.

5XL

5XL

The largest size this product goes up to is 5XL.

PRODUCT DETAILS & SPECIFICATIONS

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Discover the Portwest Thermal Trouser - Navy: Your best companion for those cold days. Specifically crafted to deliver a layer of warmth around the lower body, this trouser ensures you remain cozy and comfortable even in colder conditions.

Key Features:

  • Superior Insulation: The B121 design and soft poly-cotton fibres work in unison, trapping heat effectively and ensuring consistent warmth around the lower body.
  • Optimal Comfort: Designed with a comfort fit in mind, these trousers prioritize your comfort. The elasticated waist ensures a snug fit, while the ribbed hem prevents ride-up and keeps cold air out.
  • Versatile Aesthetics: Available in a range of corporate colours, these trousers can seamlessly fit into various professional settings, ensuring you look as good as you feel.
  • Size Range: Catering to diverse body types, these trousers are available in sizes up to 5XL. Whatever your size, we've got you covered.

With the Portwest Thermal Trouser - Navy, you no longer have to compromise on comfort during chilly days. Whether you're at work or out for a walk, these trousers provide reliable thermal protection without sacrificing comfort or style. Make the right choice for your winter wardrobe with these industry-leading thermal trousers.

  • Provides insulation and thermal protection
  • Designed with a comfort fit
  • Ribbed hem for a comfortable fit
  • Available in an excellent choice of corporate colours
  • Available in sizes up to 5XL

Specifications

Weight
0.32kg 0.32kg 0.32kg 0.32kg 0.32kg 0.32kg 0.32kg 0.32kg 0.32kg 0.32kg
Colour
Navy
Country of Origin
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan
 Pakistan

Material Specs

Shell Fabric
50% Polyester, 50% Cotton
Shell Weight
200g

Specifications are subject to change - See Terms & Conditions for more info

WASHING INSTRUCTIONS

  • Wash at 40°C maximum, gentle cycle
  • Do Not Bleach
  • Do Not Tumble Dry
  • Line Dry
  • Iron Max 150°C

    This item can be ironed on a medium temperature setting of up to 150°C

  • Do Not Dry Clean