ProTec PB304 Rectangular Alto Sax PRO PAC Case - Black The Alto Saxophone Rectangular PRO PAC Cases offers great protection and durability with a traditional look. This case features a highly protective shock absorbing wood frame, weather resistant ballistic nylon exterior, soft interior lined with velvoa, separate neck and mouthpiece sections, and handy interior accessory compartment. -Weather-resistant 1680 ballistic nylon exterior with reinforced zig-zag stitching -Compact lightweight shock absorbing wood frame -Large front-side zippered pocket -Backpackable with optional backpack strap (model #BPSTRAP)