Sierra Designs Night Cap 20 Synthetic Sleeping Bag

-1.6°C Comfort Limit (EN13537:2012), 1134g of SierraLoft Eco Synthetic Insulation
Weighs 1388g (Regular bag)
Code: SS21258V
  • Now From £139.99
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Sierra Designs says:

Based on our bestselling Cloud, but now in a lower cost, fully recycled synthetic package, the Night Cap features a zipperless design with an integrated comforter for all the comforts of home in the backcountry. The Night Cap also incorporates our patented self-sealing foot vent and a pad sleeve, allowing increased ventilation for hot sleepers and movability for wiggle worms, side, and stomach sleepers.

| Click here for more info on Sierra Designs, their history, philosophy and information on how they support their mission to get everyone 'outside'.

We're working out what we think about Sierra Design's Night Cap 20 Synthetic Sleeping Bag, we'll add our comments here in due course.

- 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
  • Patent pending zipperless design for the ultimate comfort
  • Oversized integrated comforter gives you all the comforts of your bed at home
  • Insulated shoulder pockets keep comforter wrapped around you and seals out drafts
  • Patented self-sealing foot vent provides fast and easy ventilation
  • Integrated sleeping pad sleeve keeps pad under you for comfort and warmth
  • Hood cinch to keep in heat when the temps drop
  • Recycled materials reduce environmental impact
  • ISO tested
  • Stuff sack included for easy pack up and transport

Temperature Rating

  • Temperature Rating: 20°F / -6.67°C
  • ISO Comfort Rating: 34°F / -1.6°C
  • ISO Limit Rating: 23°F / -5°C

Regular Specs

  • Weight: 1388g (excludes storage bags)
  • Fill Weight: 40 oz /1133.98 g
  • Fits Up To: 72 in / 183 cm
  • Length: 78 in / 198 cm
  • Shoulder Circumference: 60 in / 152 cm
  • Hip Circumference: 58 in / 147 cm
  • Footbox Circumference: 40 in / 102 cm
  • Stuff Sack Size (L x W): 7.5 x 15" / 19 x 38cm

Long Specs

  • Weight: 1560g (excludes storage bags)
  • Fill Weight: 41 oz / 1162.33 g
  • Fits Up To: 78 in / 198 cm
  • Length: 84 in / 213 cm
  • Shoulder Circumference: 62 in / 157 cm
  • Hip Circumference: 60 in / 152 cm
  • Footbox Circumference: 42 in / 107 cm
  • Stuff Sack Size (L x W): 7.5 x 15" / 19 x 38cm


  • Insulation: SierraLoft Eco Synthetic Insulation
  • Shell Fabric: 20d Recycled Nylon Ripstop
  • Liner Fabric: 20d Recycled Nylon Taffeta
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