Babies will stay especially cozy when snuggled inside our sleep sack. Inverted zipper for easy diaper changes. 100% Pima cotton; machine wash. Available in Airplane, Space and Holiday. Newborn fits 0-3 months (5-10 lbs, 19-23 in), Small fits 3-6 months (10-18 lbs, 23-26 in), Medium fits 6-12 months (16-24 lbs, 26-30 in) and Large fits 12-18 months (22-28 lbs, 30-35 in). *bella bliss® uses the finest cottons available. For best results, lay flat to dry then fluff on low heat. Please note, when ordering, that our Pima items are not pre-shrunk.