How to Choose Sleeping Bags for Backpacking

With a sustainable design that doesn't sacrifice performance in 30°F temps, the PFC-free Marmot Trestles Elite Eco 30 bag's fill is 100% recycled, with the lightweight compressibility of the original.
Imported.
| Best Use | Backpacking  | 
|---|---|
| Tested Lower Limit | 28 degrees (F) - EN  | 
| Tested Comfort | 37.6 degrees (F) - EN  | 
| Temperature Rating (F) | 30 degrees (F)  | 
| Temperature Rating (C) | -1 degrees (C)  | 
| Weight | Regular - Left Zip: 1 lb. 14.2 oz. Long - Left Zip: 2 lbs. 0.4 oz.  | 
| Shell | 100% postconsumer recycled polyester ripstop  | 
| Zipper Location | Left  | 
| Insulation Type | Synthetic  | 
| Fill | HL-ElixR Eco 100% recycled fibers  | 
| Sleeping Capacity | 1-person  | 
| Lining | 100% postconsumer recycled polyester taffeta  | 
| Sleeping Bag Shape | Mummy  | 
| Fits Up To (in.) | 80 inches  | 
| Shoulder Girth (in.) | 60 inches  | 
| Hip Girth (in.) | Regular - Left Zip: 55.9 inches Long - Left Zip: 57.9 inches  | 
| Stuff Sack Size | 8.7 x 18.1 inches  | 
| Stuff Sack Volume | 17.5 liters  | 
| Gender | Men's  | 
| Sustainability | Contains recycled materials  | 
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Good build quality, but the loft and warmth was less than other bags I own with same rating. I own the cheaper and heavier version of this bag from marmot, before the eco version. It’s significantly warmer, comfortable in the 30s this bag I’m pretty uncomfortable below 40 with.