100% organic interlock cotton - GOTS Soft, durable, and thoughtfully designed, our Organic Cotton Bundler makes those early months just a little easier. The elasticated bottom allows for quick, hassle-free nappy changes — no snaps to deal with during those 3 a.m. wake-ups. Its relaxed, roomy fit gives growing babies plenty of space to move and stretch, so you’ll get more wear from each size. Finished with an envelope neckline for easy dressing and fold-over mittens to help prevent scratching, every detail is made with comfort and practicality in mind — for both baby and you. Wear on it's own or layer over a cotton singlet or bodysuit. Add a sleeping bag over top for extra warmth on cooler nights.