Sierra Designs Synthesis 50 Sleeping Bag: 50F Synthetic

Ultralight Synthesis 50 Sleeping Bag for warm-weather adventures and fastpacking trips

What Our Gearhead® Experts Are Saying:

"I take the Synthesis 50 Sleeping Bag on summer backpacking trips when every ounce matters. It’s lightweight, compresses down small, and still provides enough warmth for cool nights in the backcountry. The synthetic insulation keeps performing even when damp, making it a reliable choice for unpredictable conditions. Plus, the zipper design lets me ventilate easily when temps rise."

When we’re heading out on fast-and-light summer adventures, the Sierra Designs Synthesis 50 Sleeping Bag is our go-to for a comfortable night´s rest. Its lightweight synthetic insulation provides just the right amount of warmth for mild nights, and it continues to perform even if moisture creeps into our tent or bivy.

Designed for efficiency, the Synthesis 50 features a relaxed mummy shape that balances comfort with weight savings. A full-length zipper offers easy venting on warmer nights, while the included stuff sack keeps it compact in our pack. Whether we’re bikepacking, thru-hiking, or setting up camp under the stars, this bag keeps us sleeping soundly without weighing us down.

Details

• Ultralight sleeping bag for warm-weather camping and backpacking
• Synthetic insulation retains warmth even when damp
• Relaxed mummy shape balances comfort and packability
• Full-length zipper provides easy entry and ventilation
• Compressible design fits easily into small packs
• Ideal for summer thru-hikes, bikepacking, and minimalist adventures
• Item #SDSZ40C

Tech Specs

Material

nylon ripstop

Insulation

SierraLoft synthetic

Shape

mummy

Zipper

full-length

Max User Height

6ft 6in

Shoulder Circumference

64in

Hip Circumference

58in

Foot Circumference

42in

Bag Length

[long] 82in

Venting

full-length zipper

Fill Weight

11.9oz

Degree

50°F

Storage Sack

yes

Stuff Sack

yes

Stuff Size

15 x 7.5in

Claimed Weight

1lb 8oz

Activity

camping, climbing, travel

Manufacturer Warranty

limited lifetime