Description by brand: The iPlay Navy Octopus Pocket Swim Trunks with built in reusable absorbent diaper helps provide secure protection for babies & swimmers. i play.® is the original Swim Diaper manufacturer and has a patented three-layer design. The wicking liner helps prevent diaper rash, the inner absorbent layer helps protect against messes outside the pool, and the waterproof outer layer works with the snug-fitting waist and legs to provide secure protection from unsanitary and embarrassing accidents in the pool. No other diaper necessary! Trim, lightweight diaper encourages swimming Snug fit helps contain solid matter & is approved for public pools Economical & creates less waste—use & reuse Materials: Microfiber polyester shell; Polyester lining U.S. Pat. No. 7,678,094 Mom notes: Trunks are in very good condition. It's very useful to have the integrated diaper. Thankfully, we never needed it. 😅