The PP sweater helps with problems in the shoulders, neck, back, arms, and elbows. Polypropylene (PP) is a material with special properties. It transports moisture and keeps the body dry during exertion, thereby contributing to the regulation of body temperature. It is a durable, non-pilling fabric. The PP sweater is comfortable to wear as thermal underwear, during sports, or for sleeping in. Available in sizes XS, S, M, L, XL, XXL, and XXXL.