EN343 is the European standard that applies to garments worn in adverse weather conditions. This standard specifies requirements and test methods applicable to the materials and seams of protective clothing against the influence of precipitation (e.g. rain, snowflakes), fog, and ground humidity.

The pictogram to the left indicates that protection against rain is offered.

The standard provides for two performance parameters of which there are 4 levels with Class 4 offering the highest level of protection.

• X - Water Penetration Resistance (Waterproofness) 4 Levels
• Y - Water Vapour Resistance (Breathability) 4 Levels
• R - Readymade Garment; Rain Tower Test (optional)
  R may be replaced by an X if the test has not been carried out or is not suitable.

EN342 is the European standard that applies to garments worn in cold environments. This standard specifies requirements and test methods for the performance of clothing ensembles (i.e two-piece suits/coveralls) for protection against the effects of cold environments equal to or below -5°C.

There are three main parameters:

• A - Thermal insulation (this is tested using a full-size moving mannequin & measures the amount of energy required to maintain warmth)
• B - Air Permeability (This is a measure of how windproof the garment is), AP, Class 1-3 (where 3 is best)
• C - Water penetration (waterproofness) Class 1-2 (where 2 is best); optional test

(Example to the left refers to the Portwest Hi-Vis Bomber Jacket (S463) test results)

The manikin test measures the amount of energy required to maintain warmth. This result is expressed in square metres Kelvin per Watt (m2K/W) this result can be used to estimate the maximum wear time based on the activity level of the wearer, the temperature of the environment and insulation value of the garment.

For example (see chart to the left):

A person wearing the Portwest Hi-Vis Bomber Jacket (S463) performing light activity can withstand -2°C for 8hrs and -18°C for 1hr. A person performing Medium activity can withstand -18°C for 8hrs and -36°C for 1hr.

Made with 300 Denier 100% polyester yarn, this is a tough fabric for tough conditions. 300D fabric has superb abrasion and tear resistance. The double polyurethane (PU) coating on the inside makes the fabric durable and waterproof, and the outer has a water and stain repellent coating which helps keep the garment clean.

Portwest Extreme™ is a premium high performance rainwear fabric constructed from 100% Polyester, 300D Stretch Oxford 200g and offers superior comfort, function, and endurance in all weather conditions. Waterproof, breathable, and windproof to the highest standards, this fabric far exceeds the requirements of EN 343 Class 4:4.

The exterior fabric surface is treated with a Texpel finish to protect against water and oil stains, and the microporous fabric delivers exceptional stretch characteristics.

Portwest Extreme™ Waterproof is a premium high performance rainwear fabric that offers superior comfort, function, and endurance. Waterproof to over 15,000mm for maximum wet weather protection.