Highly popular for being ultra-lightweight and compact!! Sleeping bag cover using silver Tyvek for construction, standard version, with storage bag Excess shapes and parts have been removed to achieve ultimate weight reduction! The thick fabric is tear-resistant, and the bottom gusset eliminates the cramped feeling around the feet. The flap at the entrance is reinforced, so it won't tear even with rough handling. Using it over a sleeping bag can increase the applicable temperature by 5°C, and you can sleep with just this in the summer. (In August, I was able to stay overnight in the Northern and Southern Alps with a stock shelter + mat + this cover.) I used it for 6 nights as a trial. Although I sweat a lot, there was no condensation inside the sleeping bag cover. There was no difference in sunny/rainy/foggy conditions, or with/without a sleeping bag. No condensation occurred even when my family used it. I used it twice for summer car camping other than mountain climbing, and slept with just the cover, which was comfortable without condensation. Supplement: I think there are individual differences, so it does not guarantee 100%. Shipping will be folded into an envelope and sent. The price is set at the limit including shipping, so please refrain from discounts. Shape: Mummy type, no zipper Features: Insulation, heat retention Suitable height: 150-180cm Expanded size: Length 175 x shoulder width 78 (equivalent to φ49) x foot width 60 (equivalent to φ38) x bottom gusset 20 x entrance fold…30 (cm) ※Reference: The width is equivalent to SOL Escape Lite Bivvy, and you can also put in a sleeping bag for mid-winter, but the suitability varies from person to person. Storage size: φ9x11 (cm) ※Same size as Evernew "Titanium Mag Pod 500". Weight: Body 154g, bag 5g, total 159g Outdoor bedding: Sleeping bag cover Season: All season #Tyvek #SleepingBagCover #Mountaineering #MountaineeringGear #Camping #DisasterPrevention #SleepingBag #UL #Ultralight #Fastpacking #Handmade #HeatRetention #Insulation