HEATTRAP sauna shirt with high elasticity and sweat-inducing effects. - Model Name: HEATTRAP Sauna Shirt - Material: Polymer double structure - Sweat Effect: Increased sweating - Elasticity: High elasticity - Sales Rank: #1 on Amazon & Rakuten Bestseller Rankings I have purchased too many of these, so the photos show an opened item, but the item I will ship is a new, unopened one. According to HEATTRAP's size guide, size S is recommended for people under 159cm tall with a standard build. Please feel free to ask any questions. Thank you for looking.