This YONEX UNI O warm-up is warm thanks to its Heat Capsule technology. I'm a woman, and I really appreciated the size because I could layer up a lot in the cold winter. The design is just so cool (⁎⁍̴̛ᴗ⁍̴̛⁎) It's a shame that YONEX doesn't release warm-ups with this kind of high design quality anymore... This is one YONEX piece I hate to part with. There are some minor scuffs, but because the color is white, I've been very careful with it, so it's still a beautiful USED item *⸜(* ꒳ * )⸝* It's a model that's not sold anymore, so if you're looking for one, please get it ( *´︶`*) Please be sure to read my profile‼️