ALPS Mountaineering Echo Lake 20
Historic Range: $39.95-$69.99
My kids and I used these bags on a recent camping trip where we had a low of 40 degrees at night. I usually do not like mummy bags as I feel they are to confining. However, these bags were great! They were warm and comfortable. I'm a side sleeper and had plenty of room to toss and turn from side to side during the night.
The only downfall is that they are slightly big for my backpack, but given the benefits I'll deal with the larger size.
Source: bought it new