The AMBOS men's functional undershirt is made of quick-drying, vapour-permeable, flexible, warm and structured material with COOL-DRY, which excels in quick moisture wicking, the ability to absorb odors and keep the body warm, has an anatomically shaped, snug cut and elastic flat seams only for connecting the sleeves. Material composition: 65% polyester, 27% nylon, 8% elastane.