Marmot Micron 40 Down Sleeping Bag

3.5°C Comfort Limit (EN13537:2012), 260g of 650 Fill Power Down (US Method)
Weighs 636g (Regular bag)
Code: SS18425V
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Marmot says:

Stay warm and cozy on your summertime adventure in the Micron 40. This summer bag is filled with water-resistant 650-fill-power goose down and has the ability to zip open and convert to a flat blanket with its full-length wrap-around zipper. Lightweight and durable, this easy-to-pack bag has an internal stash pocket.

We're working out what we think about Marmot's Micron 40 Down Sleeping Bag, we'll add our comments here in due course.

- Reviewed by Ultralight Outdoor Gear

Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • Certified 650 fill power duck down with down defender to improve water resistance in wet conditions
  • Full length, wrap-around zipper provides great ventilation and ability to convert to flat blanket
  • Internal stash pocket
  • EN tested
  • Sewn-through baffles
  • Two hang loops
  • Stuff and storage sack included
  • Weight: 636g
  • Fit range: 183cm
  • Interior length: 203cm
  • Shoulder: 152.4cm
  • Hip: 142cm
  • Foot: 101.6cm
  • Zip: LH
  • Weight: 710g
  • Fit range: 198cm
  • Interior length: 219cm
  • Shoulder: 157.5cm
  • Hip: 147cm
  • Foot: 106.7cm
  • Zip: LH

EN Rating

  • Comfort limit: 46.4°F / 8.3°C
  • Lower comfort limit: 38.3°F / 3.5°C
  • Extreme limit: 12.2°F / -11°C


  • Shell: 20d 100% Nylon Mini Ripstop
  • Lining: 20d 100% Nylon Plain Weave
  • Insulation: 650 fill power duck down
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