Purchased the wrong size. I opened it and unfolded it, then realized the size was wrong, and put it back in the bag. There are creases from being folded, but it's still a new, unworn item. This comfortable crew neck innerwear is made of micro-acrylic material and features contact warmth and heat generation. - Size: LL - Material: 60% Acrylic, 35% Polyester, 5% Polyurethane - Features: Micro-acrylic, contact warmth, heat generation, antibacterial and odor-resistant, thin Thank you for looking.