I own the Ultralamina 32 degree bag and have absolutely loved it. It's been great from Alaska to New Zealand, and its packability and water-resistance is unbeatable.

I do, however, want to pick up something a tad warmer.

Does the 15 degree sleep warm?

Tech Specs:

Material:

20D Ripstop nylon 

Insulation:

Thermic Micro 

Shape:

mummy 

Draft Collar:

yes 

Max User Height:

(regular) 183 cm, (large) 198 cm 

Shoulder Circumference:

(regular) 158 cm, (large) 163 cm 

Hip Circumference:

(regular) 147 cm, (large) 152 cm 

Foot Circumference:

(regular) 97 cm, (large) 102 cm 

Stuff Size:

8 x 16 in 

Stuff Sack:

yes 

Storage Sack:

yes 

Degree:

15 F 

Weight:

(regular) 1300 g, (large) 1400 g 

Recommended Use:

camping, backpacking 

Manufacturer Warranty:

lifetime