No matter when headed to urban environments or out into the wilderness, this item is always in my backpack. Cold hotel room? No problem. Its a fantastic insulation layer. Unexpected cold weather on your weekend camping trip? The Mountain Serape functions both as a garment to wear as well as insulation in your sleeping bag, and it also functions as a bag of sorts on its own. Items must be multi use, and the Mountain Serape checks all the boxes when it comes to utility. Details from Hill People : DESCRIPTION The Mountain Serape is an exercise in insulation versatility. This single item functions in the following ways: insulated hooded poncho knee length greatcoat (zipper or hook secured) blanket for two in a survival situation half zip sleeping bag good for a 20-30 degree temperature gain It has the following features. 66” x 88” - Note that the way the sleeping bag mode works makes this effectively much longer when in that mode. It will extend 12” past the head of a someone who is 5’10” and 220 when in sleeping bag mode. DWR treated 70 denier mini-ripstop shell sheds snow and light rain 2.6oz / 80g primaloft fusion insulation (US made primaloft gold) YKK zippers at 2.5lbs it is heavier than a comparable sleeping bag, but lighter than a comparable sleeping bag plus comparable jacket.