Amundsen Sports pride themselves in quality fabrics for their garments. The “Milk casein” fiber used on the Formula long sleeve was originally used in many garments and household items in America and Europe during the 1930s and ’40s. It’s made using a process that is similar to rayon/viscose (derived from wood pulp), but because it’s a regenerated protein fiber, it reacts like wool.
Materials: 50% Organic Cotton, 50% Viscose Milk Protein