Marmot Never Summer 0 Down


Down warmth to temperatures as low as 0° F, with updated liner fabric, baffle height and shape to assure 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. Updated with our Down Defender treatment offering an extra level of moisture protection for sleeping bags exposed to wet environments.

Feature List
  • Certified 650 Fill Power Down
  • Down Defender to Improve Water-Resistance in Wet Conditions
  • EN Tested
  • Nautilus 5-Baffle Hood
  • Down-filled Collar with Easy Access Draw Cord
  • Heat Bump Draft Tube
  • Classic Trapezoidal Foot Box
  • "Feely" Draw Cords
  • Ground-Level Side Seams
  • Hood Draw Cord
  • Locking Zippers
  • Stash Pocket
  • Stretch Tricot Baffles
  • Stuff and Storage Sack Included
  • Two Hang Loops
  • Two Way Zipper Sliders
  • Velcro®-free Face Muff
  • Zipper Guards
Main Materials
100% Nylon Ripstop AC 1.3 oz/yd, 100% Nylon WR 1.4 oz/yd
Lining Material
100% Nylon Plain Weave WR 1.3 oz/yd
Insulation Material
650 Fill Power Down
Fill Weight
30oz (850g)
Bag Loft
Bag Temperature F
0° F
Bag Temperature C
-18° C
EN Rating
Comfort: 13.6°F / -10.2°C | Lower Limit: 0°F / -17.8°C | Extreme: -39.8°F / -39.9°C
Interior Length
85in (216cm)
Bag Dimensions (Shoulder x Hip x Foot)
63in (160cm) x 57in (145cm) x 41in (104cm)
Bag Zipper position
3lbs 8oz (1589g)