I made a sleeping bag cover using Tyvek Silver, as you all know. ◑ This, the silver "Sleeping Bag Protector," is a sleeping bag cover designed for 4-season tent camping and winter camping. By using Tyvek Silver, which everyone knows, we have increased the heat retention compared to the conventional "Sleeping Bag Protector." ◑ The size is approximately 225cm in length when laid flat, with an entrance of about 90cm, a hem of about 65cm, and a gusset of 26cm. The weight is approximately 250g (there may be slight individual differences). ◑ Our focus is on widening the entrance to reduce stress when entering and exiting, and narrowing the width towards the foot to reduce unnecessary space and fabric, thereby reducing weight. Also, as shown in the fourth photo, we have reinforced the areas around the entrance that are subject to stress, and the sides are finished with a bag stitch to increase strength. Finally, because I wanted it, I placed a smartphone pocket on the inside (this is important). ※ Wrinkles will occur due to the characteristics 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. ※ Although the material is waterproof, please note that the product is not completely waterproof because it is sewn. ※ The Tyvek logo will be printed on the inside. ※ Please note that it will be folded small for shipping. ※ We make each item with care, but there may be slight individual differences. If you are looking for perfection like a ready-made product, please refrain from purchasing. ※ 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 Camping Camping gear ISUKA cumulus Cumulus Montbell NANGA sol bivy Sleeping bag msr Patagonia Ridge Mountain Gear Atelier Blue Bottle nurc Hyperlite Mountain Gear crux tetonbros Teton Bros. omm PA'LANTE Sea to Summit Sea to Summit Big Agnes Big Sky Therm-a-Rest ENLIGHTENED EQUIPMENT Klymit