Acifort is Dunlop's unique invention of PVC, nitrile rubber, and polymers. Nitrile rubber ensures a longer lifetime and better resistance to oil, fat, blood, and chemicals. Polymers add flexibility to your boot, thereby increasing comfort. For each individual industry Dunlop developed special Acifort boots, to give you the comfort and protection you deserve.

• SB = For safety footwear, this is the most basic level. These will have toe protection against a strong impact (200 joules).
• S1 = Same as SB, plus anti-static protection, energy absorption in the heel, and is resistant to fuel oil.
• S2 = Same as S1, plus resistant to water penetration or absorption through the shoe upper.
• S3 = Same as S2, plus midsole penetration resistance.
• S4 = Same as S1, but is made from waterproof materials and is fully waterproof.
• S5 = Same features as S4, plus midsole penetration resistance.
• S6 = Same as S2, plus fully waterproof, but not necessarily fuel oil resistant.
• S7 = Same as S3, plus fully waterproof, but not necessarily fuel oil resistant.

The SB-S5 levels above meet the EN ISO 20345:2011 standard, and S6 and S7 meet the EN ISO 20345:2022 standard.

If the above code portion ends with:

• L = non-metal midsole penetration resistance (tested with 4.5mm(dia.) nail)
• S = non-metal midsole penetration resistance (tested with a 3.0mm(dia.) nail)

If the standard includes any of the following letter codes, that means the footwear has those features.

• AN – Ankle Protection
• A – Antistatic properties
• C – Conductive footwear
• I – Electricity insulating footwear
• ESD – Reduces electro-static buildup or discharge to reduce risk of damage to sensitive electronic components and devices.
• CR – Cut Resistant Upper
• M – Metatarsal Protection
• WRU – Water Resistant Upper
• WR – The entire shoe is waterproof
• LG – Ladder grip
• P – Penetration resistance
• CI – Insulation against cold surfaces
• HI – Insulation against hot surfaces
• HRO – Heat Resistant Outsole
• SRA – tested on smooth ceramic tile with dilute soap solution
• SRB – tested on smooth steel with glycerol (mimicking oily or greasy conditions)
• SRC – tested under SRA and SRB conditions