Details Mountain Hardwear HyperLamina Spark Synthetic Sleeping Bag Mountain Hardwear HyperLamina sleeping bags are quite possibly the best performing synthetic bags on the market. Lamina construction minimises cold spots, and the super efficient Thermal.Q insulation is arranged in a zoned construction to add warmth where it's needed. The snug mummy cut further minimises bulk and adds further warmth, and a single half-length front zip keeps the weight down. Manufacturer's Weight: 737g Actual Weight: 840g (not including stuffsacks) Comfort Rating: 5°C Limit Rating: 0°C Loft: 8cm Stuff Size: 15 x 33cm Inside Length: 183cm Shoulder Girth: 163cm Hip Girth: 147cm Foot Girth: 99cm Performance mummy cut for maximum efficiency Proprietary, welded Lamina™ construction enhances loft and eliminates cold spots Thermal.Q™ fill is soft, lofty, compressible, and durable Zoned construction adds warmth where it's needed most. Durable, lightweight nylon shell with DWR treatment repels water Soft Tafetta lining wicks away moisture Half-length #5 zipper with double sliders for versatile ventilation Comfort Footbox follows natural foot position for maximum warmth and comfort Face gasket and tailored hood comfortably block draughts at the hood opening and seal in warmth Stuff sack included Fill: 567g of Thermal.Q 60g Thermic Micro Fabric Lining: 20-denier Taffeta Nylon Fabric Shell: 22-denier Dobby Tactel Nylon Specifications Hyperlamina Spark Sleeping Bag