Woolpower Socks Protection 400 Designed for UK workwear professionals, arborists, rigging technicians and outdoor workers requiring flame- and hazard-resistant base-layer socks. The Protection 400 model from Woolpower uses the classic Ullfrotté Original 400 knit combined with flame-resistant synthetics to meet specialist EN standards for protection, whilst still offering merino wool comfort and insulation. Key Features & Benefits Flame-resistant blend: Ullfrotté Original 400 construction: Certified protective standards: Comfort for long wear: UK-ready sizing: Technical Specifications Specification Detail Material Composition 60% Merino Wool, 26% Aramid, 12% Polyamide, 2% Elastane Fabric Construction Ullfrotté Original 400 – terry-knit in foot & shaft Sizes Available (EU) 36-39 / 40-44 / 45-48 Colour Black Care Instructions Machine wash 60 °C; do not bleach; appropriate tumble or low-iron as per care label. Intended Use Base-layer protective sock for flame, antistatic and outdoor workwear environments. Why Choose the Socks Protection 400? If you’re operating in UK demanding work environments — tree-care, rigging, forestry, industrial outdoor sites — where flame-resistance, insulation and comfort matter, the Woolpower Socks Protection 400 deliver a premium base layer. Built to protect and perform, they give you the insulation and fit of a merino sock, with the added flame-resistant and antistatic properties required in specialist use.