These socks are the warmest around and very comfortable. The fleecy inner is thick and warm - my feet are toasty warm in winter even though they are wet.
Chillproof is an aquatic specific, windchill proof, 3-layer composite material with the thermal properties of a 3mm neoprene wetsuit that has been developed for watersports athletes.
As with the Chillproof tops and bottoms, the comfortable fleece layer lies next to the skin and wicks moisture away to help keep your feet dry and warm. The middle layer is 100% windproof yet breathable and the outer layer is a nylon/lycra blend for abrasion resistance and 4 way stretch.
These socks are a 3 piece construction, so they have a 'sole' piece, so there is no seam pressing into the bottom of your foot,. The seams are flatlock stitched so there is no seam pressing in.
Socks are not just great for keeping wet feet warm, but they also protect them from bitey bugs that seem to invade when you are on land at lunchtime and during camp set up, and they also protect against abrasion when the inevitable sand infiltrates your paddling shoes and creates a nasty rub point.