A backpack that compresses its own contents. Pump the air out and bulky clothing packs down flat, so you fit more into the same bag for a trip. Vacuum compression: Pump the air out and soft items like clothing and jackets squash down, so you fit noticeably more into the bag than you could loose. Built-in pump: The pump is part of the bag rather than a separate accessory, so there is nothing extra to pack or lose when you compress on the road. Lightweight nylon: A light body that keeps the bag itself from adding much weight, so the space you save is not offset by a heavy pack. Adjustable straps: Set the shoulder straps to your fit, so a fuller compressed load still sits comfortably. Specifications Material: Nylon, polyester lining Closure: Zip Feature: Built-in vacuum compression pump Straps: Adjustable shoulder straps Use: Travel, work, school, day trips Compress soft items like clothing rather than hard objects, since the vacuum saves space on things that squash and does nothing for rigid gear. Use it for short trips where packing light and small matters, or as a daily bag that squeezes down when full.