That number — 480 — is a bit overwhelming at first glance. But if you apply my 1-15 rule (your bag should not be over 1 pound, 15 ounces), you trim the choices to 129 sleeping bags.

To help pair this list down further, you need to consider temperature rating.

I own a Western Mountaineering Highlite, a 16 ounce, 38-degree bag. Inside the protection of a tent with a jacket, thermal bottoms and socks, I can get that bag down to a 20-25 degree rating. And my bag gets me through three seasons pretty nicely.

Honestly, there have been a few nights when I wished I had something a bit warmer, but I was only “chilly” at worst. You need to ask yourself if you really need a 20 or 30 degree rated bag, 0r if a higher rated, lighter model will do.

You’ve got to balance lightness versus comfort (and safety). There’s nothing worse than a cold, restless night on the trail. If you’re a warm sleeper you can probably get by on a higher temperated rate bag. If you get cold easily, then go for a lower rated bag.

Backpacker Magazine listed 45 bags with a temperature ratings of 30 degrees or less that meet the 1-15 rule. Only 13 bags on this list are rated at 20 degrees or below and still 1 pound, 15 ounces or less. Four of those are made by one company: Nunatak Gear LLC. The quest for lightness often comes with a hefty price tag as well with the 20-degree rated “Alpinist Nunatak” selling for $384.

Because bags are so well made and so light these days by comparison with just five years ago when I purchased my Highlite, I think I might consider a 20-degree bag for seven or eight extra ounces.

Be light. Be safe. Be one with the pack.