NEMO Disco Men's Endless Promise Down Sleeping Bag vs Mountain Hardwear Bishop Pass 15 Sleeping Bag

Editorial Team
Last modified at May 23, 2026
When it comes to backpacking sleeping bags, the NEMO Disco Men's Endless Promise Down Sleeping Bag and the Mountain Hardwear Bishop Pass 15 Sleeping Bag are two top contenders. Both bags are designed to provide warmth and comfort in various conditions, but they have distinct features that set them apart. The NEMO Disco is known for its exceptional warmth and roomy design, making it a favorite among side sleepers. The Mountain Hardwear Bishop Pass, meanwhile, is praised for its lightweight and compact nature, making it a great choice for backpackers who need to save space.

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NEMO Disco Men's Endless Promise Down Sleeping BagMountain Hardwear Bishop Pass 15 Sleeping Bag
Disco Men's Endless Promise Down Sleeping Bag
Mountain Hardwear Bishop Pass 15 Sleeping Bag
Weight

15°F / Regular: 43 oz 15°F / Regular Wide: 45 oz 15°F / Long: 49 oz 15°F / Long Wide: 51 oz 30°F / Regular: 31 oz 30°F / Regular Wide: 33 oz 30°F / Long: 34 oz 30°F / Long Wide: 35 oz

Regular: 2 lb 5.4 oz / 1060 g

Fill Power

650

650

Packed Size

15°F Regular: 11.5 x 8.5 in dia / 29 x 21 cm; compressed volume 6.7 L

Stuffed: 15.5 x 8 in / 39 x 20.25 cm; compressed volume Regular: 494 in³ / 8.1 L

Shell Material

100% recycled PET

20D ripstop nylon, DWR finish

Fits Up To Height

15°F / Regular: 78 in 15°F / Regular Wide: 78 in 15°F / Long: 90 in 15°F / Long Wide: 90 in 30°F / Regular: 78 in 30°F / Regular Wide: 78 in 30°F / Long: 90 in 30°F / Long Wide: 90 in

Regular: 72 in / 183 cm; Long: 78 in / 198 cm

Warranty

NEMO Adventure Forever Guarantee™

Limited lifetime warranty for practical life of product

Zipper Type

Anti-snag

Two-way zipper with draft guard

Down Treatment

Hydrophobic, PFAS-free, RDS-certified

Fluorine-free

Baffle Construction

Vertical along torso, horizontal below waist

Full-length down draft tube; manufacturer does not list a separate baffle construction spec

Foot Box Shape

3D

Contoured

Hood Type

Insulated, reinforced with PFAS-free waterproofing

Performance Plus Mummy cut with shaped draft collar and adjustable down-filled face gasket

Water Resistance

PFAS-free waterproofing on hood and footbox

DWR finish

Draft Collar

Blanket Fold™

Shaped draft collar with adjustable down-filled face gasket

Temperature Rating

15°F / 16°F ISO Limit

15°F / -9°C

Comfort

Disco Men's Endless Promise Down Sleeping Bag

4.8/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

3.9/ 5.0

Comfort is crucial for a good night's sleep, especially after a long day of backpacking. A comfortable sleeping bag can make a significant difference in your overall camping experience. The NEMO Disco Men's Endless Promise Down Sleeping Bag is designed with a roomy spoon shape, offering extra space at the elbows and knees, which is perfect for side sleepers. It also features a blanket fold external draft collar and multiple pockets for added convenience. The Mountain Hardwear Bishop Pass 15 Sleeping Bag, while comfortable, has a slightly more restrictive fit and a draft collar for temperature regulation. The NEMO Disco's design allows for more freedom to move and twist, making it the clear winner in this category.

Warmth

Disco Men's Endless Promise Down Sleeping Bag

4.9/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

3.9/ 5.0

Warmth is a key factor when choosing a sleeping bag, as it directly impacts your comfort and safety in cold conditions. The NEMO Disco Men's Endless Promise Down Sleeping Bag excels in this area with its 650-fill water-resistant down and Thermo Gill vents, which keep you toasty while allowing for easy heat regulation. The Mountain Hardwear Bishop Pass 15 Sleeping Bag also performs well with its 15°F rating and extra layer of down, but some users found it too warm for milder nights. The NEMO Disco's ability to regulate heat and its overall warmth make it the superior choice for colder weather.

Durability

Disco Men's Endless Promise Down Sleeping Bag

4.7/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

4.2/ 5.0

Durability ensures that your sleeping bag can withstand the rigors of the trail and last for many trips to come. The NEMO Disco Men's Endless Promise Down Sleeping Bag is made with 100% recycled polyester ripstop fabric and DWR coating, making it resistant to snags, tears, and light moisture. The Mountain Hardwear Bishop Pass 15 Sleeping Bag features a 20D nylon shell and DWR coating, providing strong abrasion resistance. Both bags are durable, but the NEMO Disco's use of recycled materials and robust construction give it a slight edge.

Packability

Disco Men's Endless Promise Down Sleeping Bag

4.4/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

3.8/ 5.0

Packability is essential for backpackers who need to save space in their packs. A sleeping bag that packs down small and is lightweight can make a big difference in your overall load. The NEMO Disco Men's Endless Promise Down Sleeping Bag is lightweight and compressible, though some may find it slightly bulkier than ultralight options. The Mountain Hardwear Bishop Pass 15 Sleeping Bag compresses down to a compact size, making it easy to pack. While both bags are packable, the Mountain Hardwear Bishop Pass has a slight advantage in this category due to its more compact size.

Versatility

Disco Men's Endless Promise Down Sleeping Bag

4.8/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

4.4/ 5.0

Versatility allows a sleeping bag to adapt to a range of conditions, making it suitable for various adventures. The NEMO Disco Men's Endless Promise Down Sleeping Bag features Thermo Gill vents and a multi-stage zipper system, allowing you to adapt to warmer or colder temperatures. The Mountain Hardwear Bishop Pass 15 Sleeping Bag also offers versatility with its vented gills and the ability to unzip fully. The NEMO Disco's additional features and adaptability make it the more versatile option for three-season adventures.

Ease Of Use

Disco Men's Endless Promise Down Sleeping Bag

4.6/ 5.0

Mountain Hardwear Bishop Pass 15 Sleeping Bag

3.2/ 5.0

Ease of use can greatly enhance your camping experience, making it simpler to adjust and snuggle into your sleeping bag. The NEMO Disco Men's Endless Promise Down Sleeping Bag features an anti-snag zipper and blanket-fold draft collar, making it easy to adjust and snuggle in. The Mountain Hardwear Bishop Pass 15 Sleeping Bag has a two-way zipper and venting options, but some users found it less intuitive to use. The NEMO Disco's user-friendly design makes it the winner in this category.

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Conclusion & Final Verdict:

After comparing the NEMO Disco Men's Endless Promise Down Sleeping Bag and the Mountain Hardwear Bishop Pass 15 Sleeping Bag, it's clear that both have their strengths. The NEMO Disco excels in comfort, warmth, and ease of use, making it ideal for those who prioritize a cozy night's sleep in colder conditions. On the other hand, the Mountain Hardwear Bishop Pass offers a more compact and lightweight option, suitable for backpackers who need to save space and weight.

Final Verdict: If you're looking for exceptional comfort and warmth, go with the NEMO Disco Men's Endless Promise Down Sleeping Bag. If you need a lightweight and compact sleeping bag, the Mountain Hardwear Bishop Pass 15 Sleeping Bag is the better choice.

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