The Liner Thermolite are high enough to be used with any type if boot. Made with THERMOLITE® that provides warmth and comfort without weight, even when wet. Because it is comfortable and lightweight, THERMOLITE® fabric and insulation allows freedom of movement making it the perfect layer. Its hollow−core fibers trap in air for greater insulation for light, yet heavy−duty performance. 10% Ea. LYCRA® ensures these socks stay up in your boots without slipping down to your toes. Features: Model for men. Medium height. Length: Mid Resistant, breathable and thin. Fabric 75% Thermolite®, 15% Nylon, 10% Lycra®. Flat Knit Toe Seam means no irritation on your toes.