Big Agnes Sidewinder SL Sleeping Bag
Best specialized sleeping bag for dedicated side sleepers seeking backcountry comfort
Designed specifically for those who prefer sleeping on their sides, this bag eliminates the restriction of traditional mummy shapes. By combining high-loft down with strategic synthetic insulation, it maintains warmth at pressure points while allowing for natural movement throughout the night.
$174.88
at
Campman
More Sidewinder options
Who it's for
- Side sleepers seeking a bag tailored to their natural posture
- Restless sleepers tired of chasing their pillow in the dark
- Backpackers who frequently suffer from cold feet during chilly nights
Who should skip it
- Active sleepers who need significant room to move their legs
- Ounce-counting thru-hikers prioritizing the absolute lowest pack weight
- Traditional back sleepers who require even insulation across the top
Performance breakdown
Side-sleeper ergonomics
Specifically contoured to eliminate the restriction typical of standard mummy bags.
Warmth-to-weight ratio
DownTek insulation provides efficient loft without adding unnecessary pack weight.
Cold spot prevention
Strategic synthetic insulation at hips and feet stops heat loss effectively.
Pillow stability
The integrated sleeve keeps your pillow locked in place all night.
Moisture management
Water-repellent finish handles damp tent conditions with reliable, consistent performance.
Hood comfort
Jacket-style design offers a snug fit without uncomfortable pressure points.
Key Specs
Temperature Rating
35 degrees Fahrenheit
Shape
Mummy
Insulation Type
650-fill DownTek and Fireline Eco Synthetic
Shell Material
Nylon rip-stop
Lining Material
Polyester taffeta
Weight
2 lbs (Regular)
Max User Height
72 inches (Regular)
Zipper Location
Center
Water Resistant
Yes
Season Rating
3-season
Know before you buy
Still have a question?
Ask Metto anything about the Big Agnes Sidewinder SL Sleeping Bag before you decide.