The Protec N264 Alto Sax / Trombone Mouthpiece Pouch is designed to protect both alto sax and trombone mouthpieces. This pouch features a nylon exterior which is both water and abrasion resistant. The zipper closure provides ultimate protection for the mouthpiece, preventing it from any damage or scratches. It's slim design allows for easy storage and backside pocket provides extra storage for any small accessories.