Double layer knit traps heat close to the skin 40% wool outer shell for warmth and odour resistance 100% Viafil inner lining for insulation and moisture transfer Seamless toe construction eliminates pressure points Cushioned heel reduces friction during long shifts Antimicrobial and anti-odour properties for all-day freshness 41 cm sock height for lower leg coverage Certified to SATRA TM 436 and CE approved Knit gauge 9 for shape retention after washing Wash at up to 40°C - no tumble drying or ironing required Portwest SK18 Thermal Work Socks for Cold Weather Double Layer Construction for Lasting Warmth: The SK18 uses a double layer knit design that traps a layer of warm air close to the skin. The outer shell contains 40% wool alongside acrylic and nylon, while the inner layer is 100% Viafil - a branded fibre chosen for its insulating and moisture-transfer properties. Comfort Through Long Working Days: A cushioned heel reduces friction during prolonged wear, and the seamless toe construction eliminates pressure points that standard seamed socks can cause. The knit gauge of 9 helps the sock retain its shape wash after wash, so the fit stays consistent over time. Antimicrobial and Moisture-Wicking Performance: Polyolefin insulating material within the construction supports moisture management, drawing perspiration away from the skin to keep feet dry. The antimicrobial and anti-odour treatment makes these socks practical for full-day use in cold, damp, or demanding outdoor environments. Cover and Certification: At 41 cm in height, the SK18 provides coverage well up the lower leg - useful under work boots and cold-weather footwear. These socks are certified to SATRA TM 436 and carry CE certification, confirming they meet the requirements of relevant PPE standards. Shop the full Footwear range from Heavins.ie, with delivery available across Ireland. Specifications Outer shell composition: 40% Wool, 40% Acrylic, 20% Nylon Inner lining: 100% Viafil Insulating material: Polyolefin Sock height: 41 cm Knit gauge: 9 Size: EU 39-43 Colour: Black Construction: Seamless toe Certifications: SATRA TM 436, CE certified Max wash temperature: 40°C (normal process) Do not bleach, do not tumble dry, do not iron, do not dry clean Warranty: 1 Year