Big Agnes generally has better quality control in my experience, but honestly both of those bags are solid choices for summer camping. The Bishop Pass might pack down a bit smaller if that matters to you
Have you considered the REI Co-op Magma 30? It's in the same price range and gets way better reviews than either of those
Spec-wise they're pretty close: Greystone 30 is a value down bag (600-ish fill, 1 lb 13 oz range) and the Bishop Pass 30 is a tiny bit lighter with slightly higher fill (650 duck down) and a legit EN comfort around 40F. In real life that means the Bishop Pass is usually a safer bet if you care about warmth-to-weight and pack size.
I have a Big Agnes single I LOVE so I’m jealous of all the folks here with the double. We have a flatlands fleece double bag and the Klymit double pad because they were the easy buttons through our wedding registry. The bag packs large for my taste but the pad is perfect. We sleep on top of each other at home and love snuggling all the same in the wild. Unless your trips are all ultralight backpacking, it’s quite cozy and romantic!
What you are describing to me just sounds like a poor quality fabric. Not all sleeping bags created the same. I love my big agnes also because of that inner fabric. Maybe try another brand?
Otherwise a liner could help as well
If your biggest concern about a sleeping bag is room for your legs to move without feeling constricted, I would try out Nemo or Big Agnes sleeping bags. Both tend to have wider profiles. Definitely go for a bag that is rated at least 10 degrees lower - preferably lower - than the temps you expect to sleep in.
Theres multiple problems with layering with clothing like this, one of which is not the warmth specific factor but the breathability. One or two layers is one thing, but with all the listed clothing and then something like the picture on top, you’re going to build up humidity near your body you can’t get rid of, and you’ll become even colder.
Next, a sleeping bag basically creates a warm pocket of air around you. The insulation in the bag helps create and maintain this pocket. The more compressed this insulation, the worse it performs. With layering clothing, you compress the insulation, making it less effective. On top of that, insulation is minimal if not nonexistent at the seams. Some puffy jackets and “extreme temp” clothing gets around this by minimizing seams but there’s almost always a few somewhere, which means no air pockets and no warmth.
If I could recommend the best case scenario for you, it would be this: find a sleeping bag you can tolerate rated to a temp appropriate for your conditions, 15F at a minimum, best scenario a 0F. Dress in only your smartwool layers, and make sure you have a good pad/sleep set up underneath you.
Sources: avid outdoorsmen, backpacker in sub 20 degree temps, and former REI employee who specialized in camping gear.
Top Outdoor Sleeping Bags on Reddit
1
NEMO
Disco 15 Series
79% positive of 114 users
Spacious for side sleepers; bulky, temp rating optimistic.
Lazy-Breadfruit-3254
