We designed these stuff sacks to easily compress lofty items such as sleeping bags and clothing to a nearly rock solid state. The unique design evenly distributes the stress of compression and prevents bulging. The original—often copied but never equaled. Accept no imitations! This product is manufactured by Granite Gear. This is Granite Gear's mission: with an eye on advancements in material and manufacturing technology and an ear for the concerns of the outdoor enthusiast, year after year they design and develop new, innovative products to make your adventure more enjoyable.