This Onesies One-piece Underwear Is An Essential In Your Baby's Wardrobe. They Are Great To Use As A Layering Piece Under Your Favorite Outfits To Keep Baby's Tummy Extra Warm. Made Of 100-percent Cotton For Comfort And Softness, They Have A Lap Shoulder Neckline For Ease Of Dressing, Hems That Are Double Stitched To Keep Smooth After Excessive Washings And A Snap Closure Conveniently Positioned For Ease Of Changing Baby's Diaper.