I made a stuff sack that can be attached to a backpack using Tyvek. This "External Pack-n-Sack" was made so that items you want to take out quickly, such as tents and food, can be attached externally and easily accessed. In my case, I often go camping with my children, so I end up with a large amount of snacks, which I call "action food." I also want to take a proper break for lunch. Taking it out of the backpack and then putting it back is a hassle. Also, if stored inside the backpack, the snacks get crushed, which lowers the children's spirits. But! With this, both the children's spirits and the altitude will be raised! The size when unfolded is 15cm (height) x 15cm (depth) x approximately 39cm (width). The weight is 30-32g (there may be slight individual differences). My commitment is to minimize rain intrusion when attached, so the seams are only on the bottom and sides, and a flap is provided inside the drawstring. Also, it is designed to make it easy to pass the buckle through the daisy chain even when the bag is packed full. * Wrinkles will occur due to the characteristics of the material (Tyvek sheet). * The material is waterproof, but the product is sewn, so please note that it is not completely waterproof. * Please understand that it will be shipped folded small. * Please note that only the Tyvek bag is included; other items are not. * Each item is made with care, but there may be slight individual differences. Please refrain from purchasing if you are looking for perfection like a mass-produced product. Tyvek tyvek Ultralight Climbing Yamatomichi atelier Blue bottle atelier Blue bottle hyperlite mountain gear hyperlite mountain gear Locus Gear tetonbros ridge mountain gear mont-bell patagonia JERRY UKAI muraco omm cumulus The North Face TACOMA FUJI NEMO NURK Stuff sack Stuff bag coopalex PA'LANTE Jindaiji Mountain Works RawLow Mountain Works