Hyke & Byke Katahdin 15°F Ultralight 4-Season Hiking & Backpacking Sleeping Bag - 625 Fill Power, Water Resistant, Forest Green (Short) - Perfect for Camping, Mountaineering & Cold Weather Adventures

Took this bag elk hunting in Montana, temps at night where in the 30's and 40's. I woke up every morning at about 3 am shivering. Only way I could stop shivering was to put my head inside the bag and curl up in the fetal position. My buddy had the 0 degree Eolus and he was sweating most of the time. I used his spare Eolus 0 degree bag 2 years ago on an elk hunt and temps got down into the 20's and I never got cold.I’m 6’0 tall 235lbs and have a 51” chest. The sleeping bag is extremely tight at my shoulders and chest, to the point where I can’t zip the bag up and even if I could I wouldn’t feel comfortable since I’d be stuck. So if you have a thick chest and wide shoulders then I’d highly recommend another brand and do your research to get a bag that allows you to have room.Not enough insulation. And there is almost no insulation on bottom, so you feel the cold from the ground or air pad/ mattress.But I like the pocket for your phone, plus how it has two way easy zippers, and how it covers the head well. And it does have adequate installation on top of you have a good tent. The best part is, the material feels soft and is lightweight and compacted.I took this bag on a fall camping trip and was comfy and cozy all night long. The material is soft and the filling was well distributed, and it packed into my bag without being enormous. I'm not sure how it would do in colder situations yet, but for most of the year it is definitely a winner. My partner was a little jealous!I did a overnight campout on Kodiak Island in 23 degrees Fahrenheit and this bag for as light weight as it is, kept me quite comfortable through the bitter cold. Only thing I found wrong with it was if the ground wasn't perfectly flat, I would slide off my Thermarest air mattress. So be sure to buy a air mattress that forms to your body, or let a little air out of the mattress to keep from sliding off it.Good price for this bag, just used it last weekend where the Temps dropped to the upper 20s. My feet finally stayed warm and one night I woke up with a little sweat. Overall the bag is great, however the stuff sack is not very good. I used a better stuff sack that helped to compress the bag much smaller. The sack it came with does not compress very small and if you bump the buckles, they pop loose and do not hold very well. Its an easy fix, I just need a bag that will keep me warmWas excited for this new bag to take the family camping in winter. Unfortunately this bag isn't warm enough despite being advertised as a 15F bad. I took camping in 40F overnight temp, insulated pad, wearing base layer, fleece, and beanie, and cold woke me up at 1:30 am. I have no issues in my 32 deg Mtn Hardware bag at lower temps so I'm not a cold sleeper. Unless I got a bad one, you pobably need the 0F bag to actually winter camp.This bag is really silky soft to touch but the down is super thin and doesn't provide much cushion between you and the ground. A more pillow-like sleeping pad is definitely a must, if you use the flat zag pads, you'll feel every bump there is to feel. Also it's great at keeping you warm until it's really windy. We had an extremely windy day on the AT and blasts of air were coming up through the floorboards of the shelter making me freeze throughout the night. More down filling wouldn't have added much extra weight but could have added more warmth and barrier.