Simple and comfortable Gap long-sleeved T-shirt, size XS, made of polyester and viscose. - Brand: Gap - Model Name: Breathes - Size: XS - Material: Polyester/Viscose - Country of Manufacture: Vietnam - Design Features: Simple design long-sleeved T-shirt I tried to wear it for exercise, but there were slits on both sides, so I didn't wear it. If you like slits, it's a good material, so how about it? Thank you for looking.