100% PolyesterPull On closureDo Not Bleach? Material: Polyester, lightweight and comfortable. two types: short sleeve open-back top, long sleeve backless pullover, suitable for spring, summer, autumn and winter.? Features: Long Sleeve / Short Sleeve, solid Pattern Type, open back, round neck, Cross Knot Top, slouchy style, super chic and lightweight.? NOTE: Our SIZE is different from amazon size, please choose the size according to our size chart on detail description.? Suitable for all occasions, this backless shirt is perfect for everyday wear fashion,you can wear it for casual, travel, workort, club, join the party, and other outdoor and indoor active, Lightweight, Casual, Sexy, Sweet, Cute.? Washing Note: Do not bleach, Hand wash and Machine washable. Any question, please feel free to contact us, we will reply within 24 hours.