Welded, with new ThermicMicro for outstanding compressibility and durability, the UltraLamina is an excellent choice for damp, cold conditions. Consistently dense insulation maintains loft through repeated washings and compression cycles. Dual side zips allow the user to sit up and read or cook while staying inside the bag.
Very happy with bag. Warm at 28 degrees, lifetime warrenty
It's been years since I've purchased a bag. Own an old Northface Bigffoot. I live out west in foothills of central California. I've used it several times tent camping in snow conditions. The temp dipped down to at least 28 and possibly lower. I stayed very comfortable wearing only boxers and a beanie. I purchased the long bag to keep extra clothes at foot of the bag in case I needed to put warm clothes on. The clothes were never needed. The bag appeared to keep its loft well.I look forward to testing it to its limits. Bag purchased at Altrec.com. I would recommend this sleeping bag and the company again.