These are an older type of boa sweatpants, not Heattech. I've worn them regularly, so the elastic in the waist is loose. They can be adjusted with the drawstring. Also, I have a small dog, so although I've recently home-cleaned them, there may be some odor. Please purchase only if you understand the above. They will be compressed and packed for posting. Dark gray UNIQLO boa sweatpants, size M, with back pocket. Side stripes. - Brand: UNIQLO - Size: M - Color: Dark Gray - Design: Sweatpants - Pockets: Back pocket Thank you for looking.