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.
Macromolecules (also known as supermolecules) are commonly grouped into four major categories: proteins, nucleic acids, lipids and carbohydrates. These are mainly composed of polymers, long molecules made up of a large number of small, similar molecules, or monomers. Proteins are polymers of amino acids. Long amino acid chains are folded into complex shapes, the shape of each determining the function of the protein.