These lightweight, mid length SealSkinz 1 Pair 100% Waterproof Super Thin Mid Socks are UK-made all-activities outdoor socks created for conditions where less insulation but total waterproof and windproof performance is required. Made with their proprietary Stretchdry technology, the outer layer has a hydrophilic membrane that simply rejects water ingress, but these socks tackle moisture from within too, with a naturally soft, breathable inner.The natural bamboo lining used for these SealSkinz socks is anti-microbial, moisture controlling and regulates temperature, keeping the foot in a constant bacteria-free, warm, dry environment, which not only makes you more comfortable, but stops the chances of blistering. SealSkinz give these socks a thermal rating of 1, lightweight protection for hot climates.