Our kid's thermal all-in-one in navy is crafted from soft terry merino wool giving great warmth without irritation. Smooth on the outside with soft looped inside it cleverly retains body heat yet wick away moisture from the skin keeping little one happy, warm and dry. The internal looped fabric gives great air circulation and helps to keep baby warm and comfortable on the coldest days. Our wool terry has a smooth outside and soft, fuzzy inside.