Verdict
All guidesResearchOpen dataMethodologyAboutContact
Head-to-head · Best Backpacking Sleeping Bags

Exped Terra 15 vs NEMO Disco 15 Endless Promise Down Sleeping Bag

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.
The short answer

Exped Terra 15 comes out ahead by a clear margin (4.4 vs 4.1). Exped Terra 15 is best for: weekend warriors seeking comfort. Read the strengths below before deciding.

Exped Terra 15
Higher ratedRanked #3 in Best Backpacking Sleeping Bags
Exped Terra 15
1 source$259.95as of Oct 11

The Exped Terra 15 Sleeping Bag balances warmth, weight, and price for 3-season backpacking. REI's Emily Pennington singled out the 650-fill down insulation, the soft fabric, and practical touches like the draft collar and 3D footbox. It's cut for middle-of-the-road sleepers and comes in five sizes. Summer and early fall camping suit it best, and ultralight backpackers will notice the extra ounces. Weekend warriors who want comfort on a budget are the right buyer.

Strengths
  • — Soft recycled 20-denier ripstop polyester shell and liner with OEKO-TEX STANDARD 100 certification
  • — Adjustable draft collar and hood help retain warmth and prevent heat loss
  • — 3D footbox design allows better blood flow and keeps toes warm during sleep
Watch-outs
  • — Stuff sack is described as bulky despite compression
$259.95 · Check Price on AmazonFull review →
NEMO Disco 15 Endless Promise Down Sleeping Bag
Ranked #2 in Best Backpacking Sleeping Bags
NEMO Disco 15 Endless Promise Down Sleeping Bag
2 sources$299.95as of Oct 16

The NEMO Disco 15 trades low weight for room to move. Its hourglass, spoon-shaped cut, zippered Thermo Gill vents and oversized draft collar won it an Editors' Pick from Better Trail, which called it one of the most luxe-feeling backpacking bags it has used. Better Trail and CleverHiker both stayed warm in it in freezing conditions, and both flag the same cost: it weighs about 2 lb 14 oz and packs bulky because of its 650-fill down.

Strengths
  • — Hourglass, spoon-shaped cut gives side sleepers room to change position, per Better Trail and CleverHiker
  • — Two zippered Thermo Gill vents release heat without opening the main zipper
  • — Kept testers warm on low-30s nights (Better Trail) and 15 to 20°F desert nights with a base layer (CleverHiker)
Watch-outs
  • — At 2 lb 14 oz it is one of the heavier backpacking bags Better Trail has tested in its class
  • — 650-fill down packs bulkier than 850-fill bags, so CleverHiker calls it a poor fit for ultralight or long-distance trips
  • — The roomy interior holds heat less efficiently than a closer-fitting mummy, per CleverHiker
$299.95 · Buy at nemoequipment.comFull review →

How they stack up

Exped Terra 15

The Exped Terra 15 carries a 15°F comfort rating, against a 31°F comfort rating on the Kelty Cosmic Down 20, and uses 650-fill down where the Kelty uses 550-fill. At 2 lbs 10.5 oz in size small it weighs about twice as much as the 1 lb 6 oz Mountain Hardwear Phantom 30, and it costs far less than the Phantom.

NEMO Disco 15 Endless Promise Down Sleeping Bag

The Disco 15 and the Exped Terra 15 both use 650-fill down and are rated around 15°F; the Disco is the roomier spoon shape. It is heavier than the Mountain Hardwear Phantom 30 (1 lb 6 oz) and Kelty Cosmic Down 20 (2 lb 7 oz), but lighter than the synthetic REI Co-op Trailmade 25 (3 lb 4.6 oz).

Specs side-by-side

SpecExped Terra 15NEMO Disco 15 Endless Promise Down Sleeping Bag
Temperature Rating15°F comfort27/16°F (ISO Comfort/Limit)
Fill Power650-fill-power650-fill down
Weight2 lbs 10.5 oz (S)2 lb 14 oz
Insulation650+ cuin/oz European Grey Duck Down—
Shell FabricRecycled 20 D ripstop polyester20D polyester
ShapeMummySpoon (hourglass) mummy
MaterialDuck Down, Polyester—
Fill Weight—1 lb 7 oz
Shoulder/Hip Girth—62/57 in
Packed Volume—14.9 L
← See the full ranking of best backpacking sleeping bags