I made a sleeping bag cover using Tyvek Silver, as many of you know. ※ This cover has a double zipper on the side, allowing it to be fully opened from the top or partially opened at the foot. ◑ This silver "Sleeping Bag Protector" is a sleeping bag cover designed for 4-season tent camping and winter camping. By using the well-known Tyvek Silver, the insulation is improved compared to the original "Sleeping Bag Protector." ◑ The size is approximately 225cm in length when laid flat, with an entrance of about 90cm, a foot width of about 65cm, and a gusset of 26cm. The weight is approximately 265g (with some individual variation). ◑ The focus is on reducing stress when entering and exiting by widening the entrance, and reducing unnecessary space and fabric by narrowing the width towards the foot, thereby reducing weight. Also, as shown in the fourth photo, reinforcements are added to the areas around the entrance that are subject to stress, and the sides are finished with a bag stitch for added strength. And because I wanted it, I added a smartphone pocket on the inside (this is important). ※ Wrinkles will occur due to the nature of the material. ※ New products have a unique smell of silver Tyvek, but the smell will disappear with sun drying or use. ※ There may be color transfer from the print on the white surface. ※ The material is waterproof, but the product is sewn, so please be aware that it is not completely waterproof. ※ The Tyvek logo will be printed on the inside. ※ Please note that it will be folded up small for shipping. ※ While we make each item with care, there may be some individual differences. If you are looking for perfection like a mass-produced product, please refrain from purchasing. ※ It is also possible to put the zipper on the left side. Please consult in the comments if you wish. ※ This is only a sleeping bag cover. When using it in winter, 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 Camping omm Therm-a-Rest Klymit Big Agnes Big Sky Teton Bros. Sea to Summit ENLIGHTENED EQUIPMENT tetonbros