Thirsties duo wraps are easy to use and easier on your wallet. The adjustable rise of this wrap design means one size will last twice as long. In fact, only two sizes will cover your baby from birth all the way to potty-learning (size 1 sold separately). Thirsties duo wraps are completely waterproof yet remain breathable, pliable, and very comfortable for your baby's delicate skin. Easy-to-use hook and loop closures provide a secure fit at every diaper change. Leg gussets provide advanced leak-proof protection and bindings are super-soft against baby skin. Thirsties duo wraps are a very trim fitting cover.