The Portwest SK20 is a flame resistant, anti-static sock for work where protective footwear layers matter. Its Modaflame knit combines modacrylic, cotton and polyester, and the flame resistance is built into the fibres themselves.
An elasticated leg holds the sock in place through the working day. A seamless toe gives a smooth, secure feel inside safety boots, and a 12-gauge knit helps it keep its shape.
Key features
- Inherent flame resistance is part of the fibres, so protection stays with the sock through repeated washing
- Anti-static properties help reduce the build-up of static charge
- Elasticated leg keeps the sock held in place
- Seamless toe sits smoothly and securely against the foot
- 12-gauge knit helps the sock retain its shape
- 28cm sock height
- Two-tone design
Materials and performance
Modaflame Knit: 48% modacrylic, 32% cotton, 20% polyester.
Standards and protection
Certified to EN ISO 14116 Index 3 for limited flame spread and to EN 1149-3 for electrostatic performance.
Care
- Machine wash at 40°C
- Do not bleach
- Do not tumble dry
- Line dry
- Do not iron
- Do not dry clean




























