This boa sleeper with moisture-wicking and quick-drying functions supports the sleep of babies who tend to sweat easily. I tried it on at home once, but my baby didn't want to wear it, so I'm selling it. It's a beautiful item, but it's a used item, so please consider purchasing only if you understand. The back uses pile material to increase sweat absorption. It also has quick-drying properties, which reduces stickiness. The adorable design with ears on the shoulders is also a highlight. [Recommended wearing season: Fall and Winter] Material: Body: 100% polyester, Pile part: 70% polyester, 30% cotton, Binder part: 65% polyester, 35% cotton, Woven fabric part: 80% polyester, 20% cotton