Portwest Extreme Cold Weather Sock - Black/Grey - 39-43 | SK18NAR39-43

• Double-layer knit - wool outer, Viafil inner lining
• 40% wool content for natural cold-weather warmth
• Viafil inner layer - anti-odour, anti-fungal, moisture-wicking
• Seamless toe reduces friction in work boots
• Cushioned heel and toe for all-day comfort
• 40cm sock height for extended leg coverage
• Tested to SATRA TM436:2010 thermal insulation standard
• CE certified - EU and UK compliant
• Machine washable at 40°C
• Dimensions: 65 x 45 x 57 mm (packaged)

Portwest SK18 Thermal Work Socks for Cold Weather

Double-Layer Construction for Genuine Warmth:

The Portwest SK18 uses a dual-layer knit construction to retain heat during prolonged outdoor or unheated-environment work. The outer shell - 40% wool, 40% acrylic, and 20% nylon - traps warmth close to the foot, while the 100% Viafil inner layer adds insulation and moves moisture away from the skin throughout the working day.

Viafil Inner Lining:

Viafil is a branded polyolefin fibre used as the inner lining material in the SK18. It provides anti-odour and anti-fungal properties alongside effective moisture transfer, keeping feet drier and fresher during extended wear in cold conditions.

Comfort Where It Counts:

A seamless toe construction reduces friction and pressure points inside work boots, while cushioned heel and toe zones add durability and underfoot comfort during long shifts. The sock reaches 40cm up the leg, providing more coverage than a standard ankle or mid-calf work sock.

Tested and CE Certified:

The SK18 is tested to SATRA TM436:2010, the recognised standard test method for thermal insulation of hosiery and footwear. The sock carries CE certification and is produced with EU and UK Declarations of Conformity available from Portwest.

Shop the Footwear range from Heavins.ie, with delivery available across Ireland.

Key Features

Double-layer knit construction - outer wool/acrylic/nylon shell with Viafil inner lining for heat retention and moisture management.
40% wool outer shell - natural fibre content traps warmth and helps regulate temperature in cold conditions.
100% Viafil inner layer - branded polyolefin fibre with anti-odour, anti-fungal, and moisture-transfer properties.
Seamless toe - reduces friction and pressure points when worn inside work boots or safety footwear.
Cushioned heel and toe - reinforced zones for improved comfort and durability over long shifts.
40cm sock height - extended coverage suitable for work boots and cold-weather outdoor footwear.
Antimicrobial and anti-odour - maintains a fresher environment inside boots during all-day wear.
SATRA TM436:2010 tested - independently assessed for thermal insulation performance.
CE certified - meets EU and UK conformity requirements for protective hosiery.
Machine washable at 40°C - easy care with no ironing, bleaching, or dry cleaning required.

Specifications

• Brand: Portwest
• Model: SK18
• Colour: Navy
• Size: EU 39-43 (UK 6-9, foot length 23.5-27 cm)
• Outer shell composition: 40% Wool, 40% Acrylic, 20% Nylon
• Inner lining: 100% Viafil (polyolefin)
• Knit gauge: 9
• Sock height: 40cm
• Construction: Double-layer knit
• Toe: Seamless
• Safety standard: SATRA TM436:2010
• Certification: CE certified
• Washcare: Max 40°C, normal process. Do not bleach. Do not tumble dry. Do not iron. Do not dry clean.
• Weight: 0.118 kg (per pair, size 39-43)
• Warranty: 1 Year

What's Included in the Box

• 1 x Pair of Portwest SK18 Thermal Work Socks (Navy, EU 39-43)

We are pleased to offer FREE delivery on orders over €499.00 to anywhere in the Republic of Ireland and Northern Ireland, and our Click & Collect service is FREE on all orders.

All items are shipped from the Athlone Warehouse in Co. Westmeath, Ireland so no import duties apply to the island of Ireland.

Delivery Costs to Republic of Ireland are €6.99 for orders Under €499.00

Same Day Dispatch €9.99
Orders placed before 12pm are dispatched the same working day, helping your items reach you sooner. Excludes bulky items.

Large Bulky Items
Please be aware that large, bulky items (large appliances, white goods, etc.) have a delivery charge of €39.99 for bulky items or €59.99 for extra bulky items to ROI

- We are now delivering to Northern Ireland with all delivery costs equal to the Republic of Ireland.

View our full Delivery & Collection information

Due to our valued customer feedback, we have updated and improved our Returns Policy.

We now offer an exhange or refund on goods purchased online, and returned 14 days after purchase.

View our Full Returns Policy