I just bought this bag, but I don't understand why it and so many others aren't mateable. I have a 15 year old 5 degree synthetic bag that has lost nearly all of its loft that I can mate with a 35 degree down turd of a bag. My wife and I rock temps as low as 10 on the front range and are never cold. Its an untapped market some outfitter should take advantage of.

Tech Specs:

Material:

(shell) microlight Pertex 

Insulation:

650-Fill down 

Shape:

mummy 

Draft Collar:

yes 

Max User Height:

(long) 6 ft 6 in 

Shoulder Circumference:

(long) 66 in 

Hip Circumference:

(long) 52 in 

Foot Circumference:

(long) 30 in 

Stuff Size:

8 x 8 in 

Stuff Sack:

yes 

Storage Sack:

yes 

Weight:

(long) 2 lb 9 oz, (regular) 2 lb 8 oz 

Recommended Use:

camping, backpacking, mountaineering 

Manufacturer Warranty:

lifetime