The Kelty Mistral 20 is a three-season synthetic mummy bag with Recycled Cloudloft Eco insulation made from recycled fibers, rated by the manufacturer to -2°C comfort / -7°C limit. It offers a lighter, more affordable alternative to down for trips outside the depths of winter.
At 1510 g total with 970 g of fill, its warmth-to-weight ratio of 4.6 is a standard figure for a synthetic bag in this category. Both shell and liner are recycled 68D polyester taffeta with a PFC-free DWR finish, and a full draft collar and draft tube back the full-length two-way zipper. A stuff sack is included, packing to 48 x 25 cm; internal length is 193 cm with a maximum user height of 183 cm.
With recycled materials, a PFAS-free finish, and a reasonable price point, the Mistral 20 suits weekend and multi-day three-season trekking, where synthetic reliability in damp conditions matters more than shaving weight down to down-bag levels.
Specifications
Comfort Temperature
-2 °C
Limit Temperature
-7 °C
Temperature Rating Standard
Manufacturer rated
Season Rating
3-season
Total Weight
1510 g (3.33 lb)
Fill Weight
970 g (2.14 lb)
Internal Length
193 cm (6.3 ft)
Packed Size ( Length x Diameter )
48 x 25 (1.6 x 9.8 ft)
Insulation Type
Synthetic
Synthetic Insulation Name
Recycled Cloudloft Eco
Shape
Mummy
Zipper Length
Full length
Two-Way Zipper
✓
Shell Fabric
Recycled 68D Polyester Taffeta
Liner Fabric
Recycled 68D Polyester Taffeta
Water Resistance
DWR treated
Draft Collar
✓
Draft Tube
✓
Stuff Sack Included
✓
Size Category
Regular
Maximum User Height
183 cm (6.0 ft)
Gender-Specific Fit
Unisex
Recycled Materials
✓
PFC/PFAS Free
✓
Warmth-to-Weight Ratio f(x)
4.6 °C/kg
Fill Efficiency f(x)
0.72 °C/100g
Weight per Degree f(x)
215.7 g/°C
Bag Type
Mummy sleeping bag
Where to buy
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Category context Sleeping Bags (417 products)
Weight
Heavier end· mainstream zone 819–1420 g· ranked 337 of 418