As you all know, I made a sleeping bag cover using Tyvek Silver. This silver "Sleeping Bag Protector" 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 Protector." The size, when laid flat, is approximately 225 cm in length, 90 cm at the entrance, 65 cm at the hem, and 26 cm in gusset. The weight is approximately 250g (there may be slight individual differences). The design features a wide entrance to reduce stress when getting in and out, and a narrower width towards the foot to reduce wasted space and fabric, thereby reducing weight. Also, as shown in the fourth photo, the areas around the entrance where stress is applied are reinforced, and the sides are finished with a French seam for added 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 unique smell of silver Tyvek, but this will disappear with sun-drying or use. * There may be color transfer from prints on the white side. * The material is waterproof, but please note that the product is sewn and therefore not completely waterproof. * The Tyvek logo print will be 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. * 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 suitable for the environment. Tyvek Tyvek Silver tyvek yamatomichi locusgear sleeping bag cover camping camping gear ISUKA cumulus cumulus montbell nanga sol bivy sleeping bag msr patagonia ridge mountain gear atelierbluebottle nurc hyperlite mountain gear crux tetonbros tetonbros omm PA'LANTE Sea to summit sea to summit big agnes big sky thermarest ENLIGHTENED EQUIPMENT klean kanteen