The Thermal Liner Socks from SEALSKINZ will keep your feet warm! Stay out of the heat when you wear SealSkinz with the SealSkinz Thermal Liner Socks. They place a warm quilted layer inside your SealSkinz waterproof socks to maintain comfort and provide extra warmth. While not waterproof themselves, the soft wool-blend liner socks insulate without irritation or itchiness. They add the extra cushioning, comfort and warmth you need during trekking, trekking, stagnation or prolonged cold training periods. SealSkinz Merino Thermal Liner Socks are fast absorbing and antimicrobial for a healthier foot environment. Unique padded zones and added elastane ensure a perfect fit in shoes and boots to reduce the risk of blisters, rubbing or chafing.