This Mountain Hardwear® three-season 20° bag's expandable draft tube adds versatility. FILL. Polyester fibers. TEMPERATURE RATING (F). 20 degrees (F)

• Soft Thermolite Extra fill is engineered to provide 3-dimensional, springlike loft for superior warmth with minimal weight
• Performance-cut mummy shape saves weight by reducing girth at shoulders, hips and lower legs
• Quantum Expander allows unparalleled versatility; zip it up for a snug, technical fit or unzip it for eight inches added girth, yielding a roomier bag
• Offset quilt construction means no sewn-through seams and no cold spots
• Four-panel contoured hood with down-filled face gasket forms around head to seal in heat
• Warmth is optimized through differential cut of shell and lining fabrics, allowing adequate room for the insulation to expand to its full loft
• Trapezoidal footbox keeps feet from being scrunched and allows insulation to loft fully for added warmth
• Insulated draft tube backing two-way, full-length zipper and insulated zipper gusset seal in heat
• Anti-snag construction prevents fabric from catching in the zipper; locking sliders keep the zipper in place for customized ventilation
• Tie-in loops stabilize Mountain Hardwear 3D Upgrade Liner, sold separately
• Comes with stuff sack