Portable and light weight alto sax case waterproof nylon cloth exterior - Lightweight alto sax case contoured fit for most Eb alto sax . - High quality and density waterproof Nylon cloth exterior ,With big pocket (16.5X7.1 inch) for music and other accessories . -Strong and comfortable handle ,adjustable shoulder strap ,convenient subway handle,build-in padded adjustable backpack padded straps . - High protective foam padding and soft interior lining . -Long lasting zippers and durable rubber feet .