Sleeping Bags | Mummy BagsNemoSold by Sportsmans Guide

Nemo

NEMO Forte Endless Promise 20deg Sleeping Bag

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Rated 20°f

For cold-weather sleeping conditions

Classic Spoon

Shape provides extra room at

Updated Thermo

Gills use a multistage zipper

Filled 100%

100% post-consumer recycled Zerofiber PCR

Made Bluesign-approved

Shell and recycled liner

$219.95
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SKU: WX2*0742852

Overview

Built for hunters and other backcountry users who want a 20-degree bag with a roomier feel, this sleeping bag uses NEMO’s Classic Spoon shape to give side sleepers more space at the knees and shoulders. Its synthetic insulation is designed to pack down small while still providing warmth even when wet, making it a practical choice for variable conditions. The updated Thermo Gills, Blanket Fold draft collar, and integrated pillow pocket add comfort-focused details without overcomplicating the design. As part of NEMO’s Endless Promise line, it also emphasizes recycled materials and a mono-polymer construction intended to support full recyclability.

Why Hunters Choose the Nemo

Rated 20°f

For cold-weather sleeping conditions

Classic Spoon

Shape adds room at the

Thermo Gills

A multistage zipper system

Filled 100%

100% post-consumer recycled Zerofiber PCR

Bluesign-approved Shell

Recycled liner support the Endless

Key Features

  • Rated to 20°F for cold-weather sleeping conditions.
  • Classic Spoon shape provides extra room at the knees and shoulders.
  • Updated Thermo Gills use a multistage zipper system to extend comfort range.
  • Filled with 100% post-consumer recycled Zerofiber PCR synthetic insulation.
  • Made with a bluesign-approved shell and recycled liner.
  • Designed with mono-polymer construction for full recyclability.

Best Used For

  • Backcountry hunters needing a 20°F sleeping bag for shoulder-season camps.
  • Side sleepers wanting extra room at the knees and shoulders overnight.
  • Users prioritizing recycled materials and a fully recyclable sleeping bag design.
  • Campers who want synthetic insulation that still provides warmth when wet.
  • Hunters packing into smaller camps and valuing a bag that packs down small.

Specifications

ConstructionMono-polymer construction
Draft CollarBlanket Fold draft collar
Endless PromiseA NEMO Endless Promise product
Insulation100% post-consumer recycled Zerofiber PCR synthetic insulation
Linerrecycled liner
Materials100% recycled polyester ripstop and 100% recycled polyester taffeta
PackabilityPacks down small
Pillow PocketIntegrated pillow pocket
RecyclabilityFully recyclable
ShapeClassic Spoon shape
Shellbluesign-approved shell
Side Sleeper FriendlyYes
Temperature Rating20degF
Thermo GillsUpdated Thermo Gills with new multistage zipper system
Warmth When WetProvides warmth even when wet

Pros

  • Rated to 20°F for cold-weather sleeping conditions
  • Classic Spoon shape adds room at the knees and shoulders
  • Thermo Gills extend the comfort range with a multistage zipper system
  • Filled with 100% post-consumer recycled Zerofiber PCR synthetic insulation
  • Bluesign-approved shell and recycled liner support the Endless Promise design
  • Mono-polymer construction is designed to be fully recyclable

Considerations & Trade-offs

  • Rated to 20°F, so it is aimed at cool-weather use rather than deep-winter conditions.
  • The Classic Spoon shape adds room at the knees and shoulders, which improves comfort for side sleepers but may feel less streamlined than a narrower mummy bag.
  • The updated Thermo Gills and multistage zipper system add adjustability, but they also introduce more features to manage compared with a simpler sleeping bag design.
  • Its mono-polymer, fully recyclable construction and recycled materials are a clear sustainability focus, though that may come with fewer material options than non-recyclable builds.

Suggested Comparisons

  • Sleeping bags
  • Synthetic sleeping bags
  • Backpacking sleeping bags
  • Cold-weather sleep systems

Suggested Accessories

  • Sleeping pad
  • Sleeping bag liner
  • Compression sack
  • Camping pillow

Frequently Asked Questions

What temperature rating does the NEMO Forte Endless Promise 20deg Sleeping Bag have?

It is rated to 20°F.

Is this sleeping bag designed with sustainability in mind?

Yes. The Forte is part of NEMO's Endless Promise line, uses mono-polymer construction, and is described as being designed to be fully recyclable. It also uses a bluesign-approved shell, a recycled liner, and 100% post-consumer recycled Zerofiber PCR synthetic insulation.

What kind of fit does the Classic Spoon shape provide?

The Classic Spoon shape is designed to add room at the elbows, knees, shoulders, and knees for a less-constricted feel, which is especially relevant for side sleepers.

Does the bag include features for managing comfort and drafts?

Yes. The description lists Updated Thermo Gills with a multistage zipper system, a Blanket Fold draft collar, and an integrated pillow pocket.

What insulation is used, and what does the product description say about it?

It uses Zerofiber PCR lightweight synthetic insulation made from 100% post-consumer recycled material. The description says it packs down small, maintains its loft, and provides warmth even when wet.