Miki House Light Blue Jinbei (Japanese Summer Pajamas) Size 80 This Jinbei is made of absorbent gauze material. Made of 100% cotton, it should be comfortable for babies who sweat a lot. I don't see any stains, but there is some fraying on the right shoulder, and the pants have small pills overall. It's not noticeable when worn, but please purchase only if you don't mind.