Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag

Embarking on my outdoor adventures, I recently welcomed the Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag into my gear repertoire, and it swiftly became a trusted companion under the open sky.The synthetic fill emerged as a hero in unpredictable weather conditions, showcasing its unparalleled insulation even in damp environments. This feature proved invaluable during a night fraught with unexpected rain showers, ensuring that I remained comfortably warm throughout the entirety of my slumber.The sleeping bag's 20-degree rating lived up to its promise, enveloping me in a cocoon of warmth during chilly nights. The mummy shape, expertly designed to retain body heat, combined with the adjustable hood, provided an extra layer of coziness when temperatures dipped. Smooth-operating zippers and an effective draft collar sealed the deal in keeping the cold at bay.Durability proved to be a defining trait of the Kelty Cosmic, with its ripstop nylon shell resiliently standing guard against abrasion, contributing to an extended lifespan. The inclusion of a compression sack further emphasized its backpacker-friendly design, allowing for easy packing and optimizing precious space.A standout feature was the dual-slider zipper, offering the flexibility to ventilate during warmer nights without sacrificing comfort. The interior lining, soft against the skin, enhanced the overall sleeping experience, adding a touch of luxury to my outdoor retreats.While the Kelty Cosmic shines in numerous aspects, it's fair to note that, like most mummy bags, it may feel a tad restrictive for those who relish more room to move. However, this design choice plays a pivotal role in the bag's efficiency in retaining heat, ultimately enhancing its performance in colder climates.In summary, the Kelty Cosmic Synthetic Fill 20 Degree Sleeping Bag stands as a reliable, warm, and durable companion for backpackers navigating diverse weather conditions. Its synthetic insulation, paired with thoughtful design elements, positions it as a standout choice in the realm of outdoor gear, offering both reliability and warmth in every adventure.

I've only been able to use this for two nights thus far, but they provided a good testing ground. For reference, I'm 5'11" and about 215lbs. I got the regular size, and it fits like a (comfortable!) glove. I also have size 13 feet, so the foot box was slightly snug if I stretched out, but it helps to have insulated toes so no complaint there.I slept on a crummy $25 sleeping pad with little to no insulation, along with an exercise mat for some extra cushion, and I wore thermal bottoms, regular socks, and a thin t-shirt. On night one, temps were in the upper 30s. I had brought a light blanket with me in case I needed it, but I didn't end up using it at all the first night. I was pleasantly surprised, and slightly sweaty when I woke up since I had it in full mummy mode. On night two, temps dipped to the low 30s, so the sleep outfit helped and the blanket became useful. However, I think with a proper thermal sleeping pad, I would've been just fine without the blanket. The exercise mat, while nice and cushy, didn't help in the cold department either.The side zipper didn't even think about snagging. There's a thick strip of nylon that runs along the inside zip, so there's basically nothing to catch on. The outside doesn't have this so it may hang there if you're not careful, but I had no issues. This is the first time I didn't spend five solid minutes fighting a zipper. Also, and take this with a full tablespoon of salt since I've never been backpacking, but this bag seems to compress very well. I was car camping and didn't need to cinch it down much... so naturally I squeezed it to the size of a small watermelon just to test it out.I didn't expect to find such a fantastic sleeping bag at a price point this low with a freaking lifetime warranty. I'm very happy with the purchase and am looking forward to using it more.

I purchased this to replace another, more expensive bag, that claimed a lower temperature range (but with no ISO rating). This bag is very comfortable and warm even when wet.

I received this sleeping bag today. It is the Kelty Cosmic Synthetic 20 F Long in the color Dark Shadow. I have included photos of the tags that were affixed to the bag and stuff sack and the orange one held on with a tether. Upon initial review (I have not had it out in the woods yet), it appears to be well made and very warm.Here's what I found:Use Dimensions: 84 inches long? Yes; 32 inches wide at shoulder? Yes if you pull it gently, 31 inches if you don't. Will it fit a big guy? I'm 6 foot 1 inches and 238 lbs and I fit just fine with room to spare at the bottom. Remember it's a mummy bag so it's going to be difficult to roll inside it if you are big and a side sleeper but the whole bag will roll easy enough.Packed Dimensions: I got it down to 14 inches by about 9.5 inches fairly easily. It will fit perfectly in my Osprey Atmos.Weight: The tag states 3.02 lbs. My luggage scale came in at 2.98 lbs without stuff sack. 3.16 lbs with stuff sack.Material: Shell is nylon. Lining is polyester - it's smooth not grippy like fleece. The insulation fill (Cirroloft) is polyester. See tag photos.Zippers: It has a two way zipper on the right side of the bag, so you can get some air in, at about your knee not your feet. I'd estimate the zipper starts about 2 ft up from the bottom of the bag. See photo.Cinch: It's on the left, so opposite the zipper. Seems to work just fine.Warmth: I haven't used it out in the cold but just laying in it with the zipper all the way up I was roasting in about a minute. The draft tubes are in the right places and fairly wide so they look like they would work well to keep your heat in. I particularly like the one that's at the top near your chest, this one will stop the warm air from coming out around your neck and head.The initial quality of this sleeping bag is excellent.

Used it on an elk hunt in late September, temps weren’t super cold but chilly, bag worked to my needs