Cosmic Ultra 0

Warmth starts from the ground up. Starting with a good thermal pad. Not all pads are designed for cold temperatures and using the wrong pad is why many people get cold. -15 degree bag should work just fine. That means if you had nothing else but a sleeping bag it would keep you warm at -15 degrees. Adding a good thermal pad will keep you warm. When buying a sleeping bag you will need to consider your height. If you are using a long sleeping bag and you are 5’10” tall, all your heat is going to the empty space below your feet. Getting a bag that fits you perfectly will help keep you warm. I hunt all over the PNW for the past 35+ years. My fall sleeping bag is 15 degrees my winter or late hunt is -15 degrees. Combined with my thermal pad I have never woken up cold. I use a SlumberJack for my 15 degree bag and I use a Marmot. REI Marmot Trestles Elite Eco 0 Sleeping Bag $209 Kelty Cosmic Down 0 Sleeping Bag. Reg $294 on sale $219. I would suggest investing in a better quality thermal pad. Therm-a-Rest NeoLoft Sleeping Pad Or NEMO Tensor All-Season Ultralight Insulated Sleeping Pad **** Best ****

My Kelty 0 bag, so I can wear shorts and t shirt and still be comfortable

My Kelty 0F that's not a mummy bag because I find those very annoying.

While it doesn't get much colder than 32F on the PNW coast, it's damn wet and windy. Last season I was suffering in my 20+ year old Sierra Designs \[synthetic fill\] so after long research I bought a Kelty Cosmic 0 Down sleeping bag for $165 \[before tax\]. It was on sale for Labor Day, but there are still end-of-summer deals out there. I'm just tent camping at parks, so weight was not an issue. I've always preferred down bags and as a retiree I need the extra warmth.

The typical weather in coastal PNW this time of year is lows in the mid 40s and I used to bring a Sierra Designs 20F synthetic bag, but with humidity at 90% and Pacific winds, it isn't comfortable. A fleece liner and extra blankets didn't make a difference so I now just bring a Kelty Cosmic 0 degree down bag.

I have a Kelly 0F bag, 15F or so was still very cold and I had to stay bundled the whole time. 3 season North Face tent.

A Kelty Cosmic 0° is around $200. It’s the often mentioned low cost down bag. It will cut your weight in half.

I froze my ass off with the Kelty Cosmic in 2024