Designed for cold winter camping and mountaineering, the Lamina Z Bonfire from Mountain Hardwear uses Thermal Q polyester insulation and Lamina construction to enhance loft and eliminate cold spots. FILL. Thermal Q polyester fibers. WEIGHT. Long - Left Zip: 5 lbs. 7 oz. Regular - Left Zip: 5 lbs. 1 oz. COMPRESSED VOLUME. Unavailable. TEMPERATURE RATING (F). -30 degrees (F)

• Slightly wider, winter mummy cut is roomy without loosing thermal efficiency
• 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, maintains excellent loft and insulates even when damp
• Ergonomic draft collar seals warmth in, keeps cold out
• 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
• Durable, lightweight nylon shell with DWR treatment repels water
• Soft polyester lining wicks away moisture
• Full length #8 zipper with double sliders for versatile ventilation
• Zippered pocket at shoulder for storage
• Nylon compression stuff sack and mesh storage bag included