Marmot Never Summer Sleeping Bag - Unisex\'s We love an Indian summer as much as you do, but sometimes the fringe seasons aren\'t as ideal as you want. That\'s why the Never Summer\'s water-resistant down, rated for temperatures as low as 0° F, ensures warmth amidst the vagaries of shoulder-season weather. The Never Summer an ideal choice for trips, climbs and treks when sub-freezing weather is imminent. Fit Chart: Unisex\'s Sleeping Bags Short - Fits Up To: 5 feet 6 inches /  167.64 cm Regular - Fits Up To: 6 feet 0 inches /  182.88 cm Long - Fits Up To: 6 feet 6 inches /  198.12 cm Features Fold-Down Second Zipper Provides added Ventilation and Easy Access, Main Zipper Anti-Snag Slider reduces Snagging Anatomical Wrap-Around Footbox Increases Insulation and Room for Your Feet, More Warmth and Comfort Certified 650 Fill Power Down with Down Defender to Improve Water-Resistance in Wet Conditions EN Tested Nautilus Multi-Baffle Hood Down-filled Collar with Easy Access Draw Cord Full Length Locking YKK Two Way Zipper with Draft Tube to Reduce Heat Loss Internal Stash Pocket and Heater Pocket in Footbox Ground-Level Side Seams Hood Draw Cord Zipper Garage Stretch Tricot Baffles Two Hang Loops Stuff and Storage Sack Included Activy: Hiking Sustainability: PFC-free DWR, Sustainably Resourced Down Best Use: Camping, Hiking/Backpacking Zipper Location: LZ, RZ Technical Specifications: Main materials: 20d 100% Nylon Mini Ripstop | 30d 100% Nylon DWR 1.18 oz/yd Bag temperature: 54.4° F / -18°C Tested Rating Comfort: 33° F / 12.5°C Tested Rating Limit: -4.72° F / -20.4°C Tested Rating Extreme: -44.32°F / -42.4°C Insulation: 650 Fill Power Down with Down Defender Lining:20d 100% Nylon Plain Weave Zipper Location: LZ, RZ Pack volume: 592.0ci / 9.7 liters Weight:3lbs 3oz / 1450g Pack volume:622.4ci / 10.2 liters Weight: 3lbs 5oz / 1515g