Pants indoor heat art with Temaltech fiber generates and retain heat inside.Tissue and light that brings warmth and comfort to being a lighter and thinner than unobtrusively under clothing garment.Ideal for outdoor sports practice bike and bike, and activities of extreme cold.Composition:54% Cotton.Washing Instructions:Wash 40º maximum.Do not bleach.Do not use dryer.Do not iron.No dry cleaning. Compare prices from: Abanderado in Men's Underwear