I am painfully oblivious to sleeping bags, but I need one. I am 6'4" and would need something to accomodate. I don't forsee any super cold outings, but would like something that would keep me warm around 25-30 degrees.

Then there is the girlfriend. Are "mating" bags a feasible idea if we are 2 different heights? Any recommendations/suggestions would be appreciated.

blm

If money is relatively no object, check out Feathered Friends. They can custom make about any bag and mate different sizes. Very good bags but not cheap...gf better turn into a wife due to cost .

As for the mating question, you can zip two bags together if the zippers are compatible. Also, one bag needs to zip on the left, the other on the right. Size doesn't matter in sleeping bags either; my SO is 6'8", I am a foot shorter, and we can zip bags together.

We find it better to use the bags as a large blanket (zipped together but opened out) than to use them as a double bag.

www.campmor.com

One thing to consider is that synthetic fill bags can still keep you warm when wet, down bags aren't so good for wet conditions. On the other hand, down bags pack down really small and light for the warmth they can provide.

I use a marmot down bag that is going on 27 years old now I think so it pays to get a good one. I also have what they called a "doubler" for it which is just a thin nylon that makes it into a double bag (zips on) with the bottom being the thin nylon, just great for warmer weather with a decent mattress. All weighing not much more than 2 pounds.

"https://www.rayjardine.com/"

Sells some cool alternatives you can make for cheap yourself. Better than bags, and really easy to make.

Lots of options check out

https://www.jacksrbetter.com
https://www.nunatakusa.com/
https://www.westernmountaineering.com

My friends Pierre and Eleanor swear by double sleeping bags. They have a double inflatable mattress and a double sleeping bag, so camping for them is just like sleeping at home. Their bikeforums name is Pel , so contact them to ask about specifics.

If the weather is going to be chilly, I strongly recommend against zipping the bags together unless you sleep snuggled up against your partner for the entire night. If you have even an inch or two between you, it can create an air pocket down the middle. This is especially true of mummy bags, which don't have a lot of spare room inside them anyway, so the surface gets pulled taught if you roll over. Cave's suggestion of zipping the bags together to use as a blanket is a good one, though.

I have had good experience with REI synthetic bags. They're a good choice for the budget-conscious and all their bags are available in right- or left-zippered. Zipping bags of different lengths together is never a problem either.

I have been very happy with the REI sub kilo for bike touring. very light and compact. I have the long version and my wife has the short version and they zip together just fine.

+1. good bang for the buck, especially if you can wait for the mouth watering 4th of july rei sale. i'd go with two sleeping bags that can zip. sometimes i just want my sleeping bag for myself, especially after long, hard, big hill days. those days i'm just not in the mood for snuggling.