Helly Hansen Women's Versa Move Short Sleeve Top with Water Bottle 47% polypropylene,53% polyester Double faced mesh knit construction with polypropylene next to the skin and polyester exterior gives this denier gradient construction rapid moisture transfer and quick drying qualities Looser cut active fit with venting front zip reflective logo and low flat lock seams for use in hot weather as well as cold Designed to be worn next to the skin as an active single layer Machine wash low tumble dry no bleach do not dry clean or iron