Mountain Hardwear Unisex Hyperlamina Spark 35 Long Sleeping Bag New $220 Perhaps the highest performance synthetic bag on the market, the HyperLamina features thermally mapped insulation and a half-length center zip maximize efficiency. Engineered to be the lightest and warmest synthetic bag on the market, Lamina™ construction welds the Thermal.Q® insulation to the shell and lining, eliminating the cold spots caused by traditional stitching. By mapping different insulation weights throughout the top of the bag Mountain Hardwear is able to concentrate warmth where you need it most – around your core and feet. Thermal efficiency is optimized by a performance mummy-cut, face gasket and single center half zip. Fabric Body: 22D Tactel Nylon Dobby Insulation: Thermal.Q™ 60 g/m² Bag Fill Type: Synthetic Engineered to be lightest and warmest synthetic bag available Proprietary welded Lamina™ construction enhances loft and eliminates cold spots Zoned insulation maximizes warmth where it's needed most Thermal.Q® insulation has outstanding compressibility and maintains excellent loft Single #5 half length center zip with dual sliders minimizes weight and still allows for ventilation Comfort footbox follows natural foot position for maximum warmth and comfort Face gasket and tailored hood comfortably block drafts at the hood opening and seal in warmth Performance mummy cut is snug, reducing girth, weight, and bulk and maximizing thermal efficiency Ultralight shell is soft and highly wind resistant Nylon compression stuff sack and mesh storage sack included Weight: 1 lb. 13.3 oz. / 830 g Bag Shape: Performance Mummy Cut Bag Loft: 3 in / 8 cm EN Rating: T-Comfort: 41 F / 5 C EN Rating: T-Limit: 32 F / 0 C EN Rating: T-Extreme: 3 F / -16 C Bag Fill Weight: 1 lb. 4 oz. / 567 g Bag Stuffed Size: 6 in. / 15 cm x 13 in. / 33 cm Inside Length Regular: 78 in. / 198 cm Hip Girth Regular: 58 in. / 147 cm Shoulder Girth Regular: 63 in. / 160 cm Foot Girth Regular: 39 in. / 99 cm Imported The sleeping bag Mountain Hardwear HyperLamina Flame -6oC Long left zipper is a sleeping bag of synthetic padding of robust construction and totally sealed against the cold, which will give you thermal characteristics to sleep comfortably and quietly in temperatures that hover around 0oC. One of the lightest and warmest sleeping bags on the market that not only gives you the heat you need but also protects you from other elements such as humidity, rain and wind.