This is a set of four baby bodysuits from Uniqlo Baby. They were only worn once after purchase. Both are made of 100% cotton, a soft material that is gentle on the skin, so they can be worn with peace of mind by babies with sensitive skin. The long-sleeved type is still useful even in the colder months, so having several is always helpful! They can be used as an inner layer on chilly days, or worn alone as pajamas when it gets warmer.