Coming in at a proven thermal rating of 2.9, 8x warmer than basic cotton socks, any man who enjoys being outdoors and taking on tough environments and cold climates needs these SOCKSHOP Heat Holders 2.9 TOG Merino Wool Socks! Providing thick cushioning for boot-wearing feet with a weather-beating blend of naturally thermally efficient and breathable merino wool and high performance man-made fibres, these mens Heat Holders socks are designed to make facing the elements easier. The inner of these classic-looking marl twist yarn boot socks has Heat HoldersUK patented long looped pile, expertly brushed to a soft, cosy fleece that maximises the amount of warm air that can be held, keeping feet warm and comfortably cushioned all day long. The construction of these socks include reinforced toes and heels for protective, durable wear, whatever challenges you take on in them. Heat Holders in partnership with Scleroderma & Raynaud's UK. SRUK is the only UK Charity dedicated to improving the l