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The Kelty Men's Lightyear 3D sleeping bag is an easy-care synthetic bag that's perfect for wetter climates. The Lightyear 3D uses two-layer, offset quilt construction to help trap heat more efficiently and ensure uniform coverage of insulation. Polarguard 3D is not too heavy, packs well, and retains most of its heat even when soaked through. A draft tube runs the entire length of the Lightyear's zipper. In a particularly clever move, Kelty put the Lightyear's side seams at ground level, which means the seams aren't sitting against your body. Loops to tie on a sleeping pad and a zippered foot vent let you get maximum comfort and therefore maximum sleep out of your Lightyear.

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Kelty Light Year 3D Sleeping Bag: 25 Degree Synthetic

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Here's what others have to say...

2 5

Kelty Lightyear +25 and +45

Just used my two new sleeping bags for the first time one week ago. I like to sleep cold and my lady friend likes to be warm so she used the +25 and I used the +45. Both of us slept on 1.5 inch self-inflating matresses (Pacific Outdoors full-length and Thermarest 3/4) in a Big Agnes SL2. Temperature was reported at 38 degrees F. We both froze our butts off. Are these ratings for these bags "comfort" or "survival,i.e. you won't freeze to death".
The next night we slept with long johns, socks, and beanies. Luckily it warmed and was only uncomfortable for 1 hour.
To be fair we are from Florida. If you're from Canada you might be happy with these ratings but I will add 15-20 degrees to these ratings.

4 5

Kelty 3D 25 Syn

It has been great so far. Light, just enough leg room, and warm. Color isn't great, but who cares about the color. Well designed bag.

3 5

Not bad, but not a 25-degree bag

I(male)have slept in a Kelty Light Year 3D about 20 nights in the past year in Gulf Coast weather ranging from hot and sticky to sub-freezing and dry. It should more appropriately be rated a 40-degree bag. Don't get me wrong. It's a great super light synthetic "second bag" for moderate temps, but not lofty enough for a truly cold night, even with clothes on. Get a good 800-900 fill goose down bag for those cold nights you don't want to wake up chilled to the bone.

4 5

Mmm Mm Good

This sleeping bag definitely kept me warm to its rated temperature. However, at first I hadn't cinched the drawstring around my head real tight so I was losing a lot of heat. But, when everything is properly tightened up it was most comfortable. Also, a very light sleeping bag so it’s excellent for backpacking. I would recommend this to any 3-season backpacker.

4 5

Good bag

First time I used it, I got it wet but it was still warm. It dried out without odor. It was not toasty warm when the outside temp was about 40F, and I slept with no pad, just three layers of tarp on the ground. It was tolerable, and a lot warmer than my old summer bag. I really like the light weight.

4 5

Great Bag!

This Kelty bag was the 3rd one that I tried this season, and it's definitely a keeper. It's warm and roomy and packs light for backpacking. The 25F rating is right on, but don't think it will keep you warm at temps any cooler. It's definitely a 3-season bag. It's a high quality bag and also looks pretty sharp when it's unrolled in your tent. I highly recommend!