So many parents have found this item to be a brilliant and versatile addition to their child's wardrobe. Extra soft 100% merino wool has been knitted to provide warmth without bulk, and the rib design up top means it will fit all sizes and shapes of babies. Natural tagua-nut buttons on the adjustable straps. As in our entire range, colourings when used are AZO-free, heavy metal free, safe reactive dyes. Handwash cycle recommended.