The HyperLamina eliminates cold spots by using a welded construction that fuses the Thermal.Q insulation to the shell and lining and maps warmth to where you need it most, around your core and feet. FILL. Thermal.Q synthetic fibers. WEIGHT. Long - Left Zip: 2 lb. 15 oz. Regular - Left Zip: 2 lb. 12 oz. COMPRESSED VOLUME. Unavailable. TEMPERATURE RATING (F). 21 degrees (F)

• Performance mummy cut is snug, reducing girth, weight and bulk while maximizing thermal efficiency
• Lamina construction welds the Thermal.Q insulation to the shell and lining, eliminating the cold spots caused by traditional stitching
• Thermal.Q insulation has outstanding compressibility and maintains excellent loft and warmth, even when damp
• Ergonomic draft collar blocks the escape of heated air from inside the bag
• Face gasket and tailored hood comfortably block drafts at the hood opening and seal in warmth
• Comfort footbox follows natural foot position for maximum warmth and comfort
• Single #5 half-length center zip with dual sliders minimizes weight and allows for ventilation
• Ultralight shell is soft and highly wind-resistant
• Silnylon compression stuff sack and mesh storage sack included