Ultra-lightweight and compact, and a big hit!! Sleeping bag cover made with silver Tyvek for construction, with a reduced draft version for the shoulders, and a stuff sack (bag can be chosen in white or silver) Compared to the standard version, one side of the shoulder flap is sewn up, and Velcro is added to the other side, creating a cocoon shape to reduce drafts. Recommended for those who feel a chill around their shoulders! The fabric is stiff, so you won't feel suffocated even if you get inside. The Velcro is a type that is not prickly. Excessive shapes and parts have been removed to make it as lightweight as possible! The fabric is thick, so it is difficult to tear, and there is a bottom gusset, so there is no tightness around the feet. The entrance flap is reinforced, so it won't tear even if handled roughly. If you use it over a sleeping bag, you 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 Alps and Southern Alps with a stock shelter + mat + this cover.) I used it for 6 nights as a trial. I sweat a lot, but there was no condensation inside the sleeping bag cover. There was no difference between sunny/rainy/dense fog, or with or 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, but it 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 by Nekopos. 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) Weight... Body 157g, bag 5g, total 162g ※About 5g heavier than the standard version Outdoor sleeping equipment... Sleeping bag cover Season... All season Condition... New, unused #Tyvek #Sleeping bag cover #Mountaineering #Mountaineering equipment #Camping #Disaster prevention #Sleeping bag #UL #Ultralight #Fastpacking #Handmade #Heat retention #Insulation #Cold protection #Shoulder