HOTCORE Nirvana 200 Sleeping Bag – Ultralight Mummy, -20°C / -4°F


SKU: Nirvana 200 Categories: , Tags: , , , , Product ID: 2939



​​Comfort: ​-10°C (14°F)
Limit: ​-20°C (-4°F)


1.45 kg​ (3 lbs 2 oz)

Synthetic ultralight sleeping bags do not have to cost hundreds of dollars or be uncomfortable. The new Nirvana sleeping bags use lightweight fabrics, micro fibre insulation, and have a generous cut mummy shape. You won’t believe the size and weight!

  • Generous mummy shape for warmth and thermal efficiency
  • 20D micro ripstop polyester outer and inner fabrics
  • Insulated sculpted hood provides secure fit and more warmth
  • Boxed foot construction that allows for a natural foot position that does not compress the insulation
  • Drawcord at shoulder – use it to trap heat in and keep the cold out
  • Nirvana 200 & 300 models have insulated neck yolk to help trap heat
  • 2-way nylon coil zipper allows for venting; reversible slider with hi visibility fabric
  • Anti-snag zipper tape, and oversize insulated draft tube behind zipper
  • 4 fabric loops allow for attached cords to hold sleeping pad in place
  • Ultralight stuff bag
  • A few words on temperature ratings…
  • Hotcore Sleeping Bag Owner’s Manual and Warranty Information



Mummy shape with sculpted hood and boxed foot


200 cm long (6’ 6”)


84cm wide (33″) at shoulders
30cm wide (12″) at the foot


1.45 kg (3 lbs 2 oz)


43 x 23 cm (17” x 9”)


Comfort: ​-10°C (14°F)
Limit: ​-20°C (-4°F)
A few words on temperature ratings…


Trueloft microfiber; 0.7 Denier, siliconized; Critical Layer Construction


20D micro ripstop polyester
Colour: Mountain Grey


20D micro ripstop polyester
Colour: Lava


#5 2 way; nylon coil self healing zipper; half length
High visibility fabric zipper pull

* all measures approximate

Critical Layer Construction

We use thermal body-mapping construction to place the insulation where it will do the most good. You already have an insulating sleeping mat below you, and most of the sleeping bag insulation that is below will be compressed by your body weight, making it inefficient. We move much of this insulation to the top of our sleeping bags where it will trap warmth from your body.Then we add an extra layer of TrueLoft™ insulation in the core body area, from the neckline to below the beltline, to help achieve and maintain the temperature ratings. This extra layer of insulation will trap more warmth from the body than comparable sleeping bags, while adding very little to the weight, size, and cost of the sleeping bag. Think of it as putting on a jacket, the first thing we all do when we need to stay warm.

We call this Critical Layer Construction.