Kelty Teton 15
Have used this bag down to 40 degrees F and it is…
Fill: Polarguard HV
Temperature Rating: +15 F
Price Paid: $99
Have used this bag down to 40 degrees F and it is TOASTY. I can't attest to the effectiveness at 15 degrees but at 40 I was VERY warm in nuttin but my BVD's.