Mountain Equipment Firefly Regular Left Zip Sleeping bag

Mountain Equipment

Firefly Regular Left Zip

Sleeping bag

As efficient a bag as it is possible to make. Inspiring confidence even when water turns to ice, this ultralight bag will pack a punch in any high mountain environment during the late spring and summer.

Comfort  4°C/38°F
Comfort Limit  -2°C/28°F
Extreme  -18°C/-0°F
Total Weight  550g / 20oz
Left Zip


  • PLASMA 10D fabrics throughout are incredibly light and breathable with PFC free DWR
  • 252g of 90-10 Goose Down with a minimum fill power of 900
  • Alpine Fit 2.0 with revised EXL® system improves comfort and loft whilst maximising thermal efficiency
  • Slanted box-wall baffles throughout
  • Ground level side seams
  • 7 baffle low volume anatomically shaped hood
  • 4 baffle anatomically shaped and offset foot-box
  • Full length Gemini zip baffle and 140cm zip with low profile grown-on front collar
  • Plasma 10D inner throughout with PFC free DWR
  • Supplied with waterproof roll-top stuff-sack and storage cube
  • Weight: 550g / 19.4oz (Regular), 580g / 20.5oz (Long) 
  • Standard Pack Size: 21cm x 18cm x 16cm
  • 100% Polyamide outer/inner, Down fill