Kayu (30°F / -1°C) Men’s Down Mummy Bag


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For Serious Ultralight Adventures.

The men's Kayu™ ultralight down mummy bag, with premium packable 800FP down and aggressive, thermally-efficient patterning, is the new pinnacle bag for ultralight adventures. With careful attention to tailoring of each curve for efficiency and comfort, the contoured hood, shaped footbox, and body-mapped tapered core are designed for ideal fit with no excess

  • A fabric set of 20D Nylon Ripstop and 30D Nylon Taffeta is ultra-plush for a supreme sleep experience.
  • Premium 800 FP down is ultra-packable, hydrophobic, PFC-free, and 100% Responsible Down Standard (RDS) Certified for traceability throughout the supply chain.
  • Thermo Gills™ allow you to vent body heat without letting cold drafts in.
  • Waterproof and breathable footbox and hood protect against tent wall condensation.
  • Tailored patterning is designed for optimal thermal efficiency and packability.
  • Premium down insulation is treated with Nikwax™ for waterproof security on the trail.
  • Body-mapped tapered core is designed for an ideal fit with no wasted space.
  • Full-length YKK zipper with snagless baffle construction and draft tube seals warm air in.
  • Protected by the NEMO Lifetime Warranty.



  • Compression stuff sack
  • Mesh storage bag



Minimum Weight

1 lb , 12 oz / 785 g

1 lb , 14 oz / 855 g

Packed Size

10.5 x 6.5 in dia / 27 x 16 cm dia

11.0 x 6.5 in dia / 28 x 16 cm dia

Temp Rating

30F / -1C

30F / -1C

ISO Lower Limit

31F / -1C

31F / -1C

Fill Type



Fill Weight

0 lb , 10 oz / 290 g

0 lb , 11 oz / 310 g

Fits Up To

6' / 183 cm

6'6" / 198 cm

Shoulder Girth

63 in / 160 cm

67 in / 170 cm

Hip Girth

55 in / 140 cm

59 in / 150 cm

Knee Girth

46 in / 117 cm

50 in / 127 cm

Compressed Volume



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