HEATTECH short-sleeve T-shirt, XL size, comfortable material with excellent heat retention. - Brand: HEATTECH - Model Name: Short Sleeve - Size: XL - Material: Polyester, Acrylic, Rayon, Polyurethane Thank you for viewing. HEATTECH short-sleeved, V-neck. Both were worn for one season. There are no particularly noticeable major flaws, but please understand that these are used items. I feel like they've stretched and become larger than when I first bought them. How about it for those looking for a larger size? Size: XL (LL)