Featuring Sealskinz own waterproof & breathable stretchy membrane these socks have an anatomical shape & hug your foot so they can worn just like regular socks. The elasticated instep & Achilles panel hold your foot providing support & comfort. Lined with deep pile Merino wool to increase comfort, warmth & wicking performance. To maximise the performance of these great socks you need to have a close fit, so please check out your size below. If the conditions are extremely cold you can boost this socks thermal rating with a pair of Seal Skinz Thermal Liner Socks. Anatomically designed mid-calf length fit Close fitting knitted construction Merino wool pile lining for warmth & moisture control Poodle padding on the toe, sole & Achilles panel for extra comfort Elasticated instep & Achilles ankle panels provide support Sealskinz Thermal Rating: 4 out of 5