Surround your baby in pure softness. SwaddleDesigns 100% cotton premium muslin zzZipMe Sack is a wonderful sleep sack for warmer environments. The breathable, soft, open weave wearable blanket replaces loose blankets for safer sleep. Our SwaddleDesigns quality muslin with watercolor designs and earthtone colors get softer with every wash. The handy 2-way zipper zips down from the top making it easy to place baby into sack and also zips up from the bottom making diaper changes easy. The zipper fly protects baby's delicate skin. Our attention to detail is why parents love SwaddleDesigns for stylish, quality essentials. Machine wash warm, tumble dry low.