Light on the back, warm in the sack.
Being a member of Marmot's Ultralight series of sleeping bags, the Hydrogen 30-Degree Down Bag is a great option for the ounce-counting backpacker that still appreciates a good night's sleep after a long day on the trail. To keep the Hydrogen warm in the face of condensation, Marmot used Pertex Microlight fabric to save weight, increase breathability, and protect the down insulation from light moisture. Better yet, the insulation consists of 800-fill down that's been finished with Marmot's Down Defender treatment to help prevent it from clumping and ultimately losing insulating properties should it happen to get wet. The basic mummy shape efficiently traps warm air and has an anatomic footbox to give your feet some extra room to roam once you're in for the night, and comes with either a left- or right-handed full-length zipper to please right- and left-sided sleepers. An additional zipper on the opposite side allows the front of the bag to fold down for added comfort when you're sitting up in your bag waiting for a storm to pass.
- 30-degree temperature rating
- 800-fill down insulation
- Down Defender water-resistant treatment
- Mummy shape with anatomic footbox
- Pertex Microlight 20D nylon ripstop
- Second fold-down zipper
- Stuff sack included
- Item #MAR00T4
- Q & A
Nice and Warm
- Familiarity: I've used it once or twice and have initial impressions
This is my first down sleeping bag, and first high end bag. I have used it once in the backyard with my son. The temperature range was from mid 40s to about 33. I slept in short socks a T-shirt and shorts. I found the bag to be quite warm at those temperature ranges. When I had the bag completely zipped I was too hot and a touch sweaty. With a partial zip down I was plenty comfortable all night, while my nose was a little chilly. I really like this bag and look forward to getting to use it at some lower temperatures to see how low the temps can go and me still be comfortable.
I would say the temperature rating is spot on for my tastes.
I would recommend this bag, after future uses I will come back and update.
- Familiarity: I've used it several times
I love this bag. In true Marmot fashion it is top quality, super light and packs small. There isn't a thing I don't like about this bag. I plan on using until the temps really dip here in Mich and then I'll pull out another of my Marmot bags. Highly recommend this bag.
Performance vs. weight beast
- Familiarity: I've put it through the wringer
I bought this sleeping bag about three years ago because it was on sale and seemed light enough for our 5 day backcountry fly fishing trip we take twice a year. Took it to Clingman's Dome in February and was surprised when we got hit by weather totally out of the forecast. I was sure I was going to be very cold. Bag did great and also has enough girth for a side sleeper. Best gear I have, it has performed in every situation. Getting ready to buy a Marmot 0 degree bag this weekend. I highly recommend this bag, especially the performance, weight and packability. I think it is the best value in the market.
Warm and Light
I would very much keep this sleeping bag but i ended up returning it to buy a cheaper marmot sleeping bag. Although it's cheaper and not as warm as this one, I just can't afford something like this right now. Maybe one day in the future~