As you all know, I made a sleeping bag cover using Tyvek Silver. * This one has double zippers on the sides so you can open it fully from the top or just a little from the foot. This "Sleeping Bag Mamorukun" (Sleeping Bag Protector) with its silver color is a sleeping bag cover designed for four-season tent camping and winter camping. By using the well-known Tyvek Silver, we have increased the heat retention compared to the conventional "Sleeping Bag Mamorukun". The size is approximately 225 cm in length, 90 cm in width at the opening, 65 cm at the hem, and a gusset of 26 cm when laid flat. The weight is approximately 265g (there may be slight individual differences). The design emphasizes reducing stress when getting in and out by making the opening wide, and reducing wasted space and fabric by narrowing the width towards the foot, thus achieving weight reduction. Also, as shown in the fourth photo, the areas around the opening where stress is applied are reinforced, and the sides are finished with a bag stitch for strength. Additionally, I added a smartphone pocket inside because I wanted one (this is important). * Wrinkles will occur due to the nature of the material. * New products may have a smell characteristic of silver Tyvek, but this will disappear with sun-drying or use. * There may be color transfer from the print onto the white surface. * The material is waterproof, but please note that the product is sewn and therefore not completely waterproof. * The Tyvek logo will be printed on the inside. * Please understand that it will be shipped folded small. * Each item is made with care, but there may be slight individual differences. Those seeking perfection like mass-produced items should refrain from purchasing. * It is also possible to attach the zipper to the left side. Please consult us in the comments if you wish. * This is strictly a sleeping bag cover. When using in winter, please be sure to use it with a sleeping bag and sleeping system that are fully compatible with the environment. Tyvek Tyvek Silver tyvek Yamato Michi Locus Gear Sleeping Bag Cover Sleeping Bag cumulus Cumulus Montbell Nanga sol bivy Sleeping Bag ISUKA msr Patagonia Ridge Mountain Gear nurc Camp omm Therm-a-Rest Klymit Big Agnes Big Sky Teton Bros Sea to Summit ENLIGHTENED EQUIPMENT tetonbros