THERMO INSOLE, which converts body temperature into heat, provides comfortable warmth for both men and women. - Product Name: THERMO INSOLE - Usage: Unisex - Materials: Polyester, EVA - Features: Body temperature becomes the heat source - Effects: Carbon effect Available in sizes from 22.0 to 28.0 cm. Stored at home, unused, but the bag is dirty. Thank you for viewing.