85%/15% cotton/nylon. Unisex. One size fits all. GI Government Issued style. Made In USA. Thermal boot socks. Keeps your feet warm in extremely cold weather. Great for outdoor activities and could be worn around the house to keep feet warm. HW-Heavy Weight. Comfortable fit.
1 contribute to the mechanical structure of animals, including humans, e.g. keratin in hair and fingernails, and fibrous proteins such as collagen in tendons. 2  enable animals to move, e.g. myosin in muscle.  facilitate transport of smaller molecules around animals' bodies, e.g. haemoglobin.
The long chains of amino acids fold to give each type of protein molecule a specific shape. Proteins act as: 1  Structural components of tissues (such as muscles). 2  Hormones (such as insulin). 3  Antibodies (part of the body's immune system). 4  Biological catalysts (enzymes).