They are over 7x warmer than regular cotton socks and 3x warmer than ordinary thermal socks. They are better than heated, electric or battery operated socks because you can just put them on without fussing with batteries, wires etc. Heat HoldersÂ® means No more cold feet!
These protein types serve as essential components to your body's construction. Keratin and collagen are the most common structural proteins. These are strong, fibrous proteins. Keratin forms the structure of your skin, nails, hair and teeth. While, collagen serves as a connective structure for your tendons, bones, muscles, cartilage and skin in particular.
Protein Structure. 1  Proteins are macromolecules that play many functions in the cell. 2  They are used for support, storage, transport of other substances, defense against invaders, and catalytic enzymes. 3  This is just a brief overview of protein structure. Proteins are composed of repeating units called amino acids.