Marmot Lithium Down Sleeping Bag

-20.9°C Comfort Limit (EN13537:2012), 790g of 800+ Fill Power Down (US Method)
Weighs 1214g (excluding stuff sack)
Code: SS18423
  • Now £384.99
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It's the combination of light weight, small pack size, excellent construction and reasonable cost make it a great value choice for 3 season backpacking. The Lithium is a mummy style sleeping bag featuring 800+ fill power hydrophobic down, a full length zipper, lots of loft and an extremely effective hood design.

Marmot says:

Tally up the ultra light fabric, high quality down and a minimalist design, and the Lithium stacks up to be our lightest bag for mountaineers and backpackers. Good in conditions down to zero degrees Fahrenheit, the updated design features on this bag help reduce shifting down and increase ventilation.

Part of Marmot's ultralight range of sleeping bags, the Lithium offers a superb balance of quality, warmth, low weight, packability, and performance versus cost. It's comparable to many more expensive products, as it is lighter and more compressible than almost all of its competitors.

The Marmot Lithium uses 800+ fill power down protected with Marmot's Down Defender to help the down to stay dry longer, loft better when damp and dry more quickly than untreated down. The Pertex Microlight fabric offers a combination of lightweight and good durability plus it's DWR coating will offer some water resistance. The fabric feels really soft which allows the down to loft freely and the slightly brushed feel of the Microlight lining fabric is extremely comfortable against your skin.

- Reviewed by Ultralight Outdoor Gear

Help and advice: Choosing a sleeping bag advice
  EN 13537 rating for sleeping bags explained
  Sleeping bag shape and sizes advice
  Sleeping Bag features Page 1
  Sleepin bag features page 2
  All about down filling in sleeping bags
  • Anatomically Wrap-Around Footbox Increases Insulation and room for your feet, more warmth and comfort
  • Smooth-Curved Baffles Reduce Down Shifting. Nautilus Multi-Baffle Hood limits heat loss
  • Full Length Locking YKK Two Way Zipper with Anti Snag Slider reduces fabric snagging
  • Filled and Finished in Rohnert Park, California
  • Certified 800+ Fill Power Goose Down with down FDefender to Improve Water Resistance in Wet Conditions
  • EN Tested
  • Internal Stash Pocket
  • Snagless Draft Tube
  • Hood Draw Cord
  • Stuff and Storage Sack Included
  • Zipper Garage
  • Stretch Tricot Baffles
  • Two Hang Loops

Temperature Rating

  • EN Rating Comfort limit: 9.0°F / -12.8°C
  • EN Rating Lower comfort limit: -5.4°F / -20.9°C
  • EN Rating Extreme limit: 45.2°F / -42.9°C

Regular Specs

  • Weight: 1214g (excluding storage bag & stuff sack)
  • Fill weight: 790g
  • Fit range: 6" / 183cm
  • Interior length: 206cm
  • Shoulder width: 155cm
  • Hip width: 142cm
  • Foot width: 113cm
  • Zip: Left Hand
  • Stuff sack size: 19 x 40.6cm
  • Stuff sack volume: 11.6L


  • Shell top: Pertex Quantum 20d 100% Nylon R/S 1.03oz/yd
  • Shell bottom: Pertex Quantum 20d 100% Nylon R/S 1.03oz/yd
  • Lining: 30d 100% Nylon  DWR 1.09 oz/sqyd
  • Insulation: 800 Fill Power Down with PFC-Free Down Defender
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