---
product_id: 610552247
title: "Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado,"
brand: "kelty"
price: "€ 443.80"
currency: EUR
in_stock: true
reviews_count: 8
category: "Kelty"
url: https://www.desertcart.fi/products/610552247-cosmic-20-down-mummy-sleeping-bag-for-backpacking-campers-550
store_origin: FI
region: Finland
---

# 550 Fill Power Down Recycled Nylon & Polyester ISO 21°F Limit Rating Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado,

**Brand:** kelty
**Price:** € 443.80
**Availability:** ✅ In Stock

## Summary

> 🛶 Sleep Warm, Tread Light: The Cosmic 20 is your eco-friendly passport to next-level backpacking comfort.

## Quick Answers

- **What is this?** Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, by kelty
- **How much does it cost?** € 443.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/610552247-cosmic-20-down-mummy-sleeping-bag-for-backpacking-campers-550)

## Best For

- kelty enthusiasts

## Why This Product

- Trusted kelty brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Chic Performance:** Crafted from recycled nylon and polyester with PFAS-free DWR—camp sustainably without sacrificing style or function.
- • **Legacy of Outdoor Innovation:** Designed in Colorado since 1952 with a limited lifetime warranty—join a community that values quality and conservation.
- • **Tailored for Every Trailblazer:** Available in three sizes with a mummy shape for optimal heat retention and comfort up to 21°F—because your adventure deserves a perfect fit.
- • **Ethical Warmth, Zero Compromise:** 550 fill power down that's 100% RDS certified and traceable—warmth you can trust and flaunt.
- • **Lightweight & Packable Powerhouse:** Weighs just 2 lbs 6 oz and compresses down to a 13x7 inch stuff sack—carry less, explore more.

## Overview

The Kelty Cosmic 20 Down Mummy Sleeping Bag combines 550 fill power ethically sourced down with recycled shell and liner fabrics treated with PFAS-free durable water repellent. Designed for 3-season backpacking, it offers a temperature rating down to 21°F, lightweight portability at just over 2 lbs, and comes in three sizes to fit adventurers up to 6'6". With a heritage rooted in Colorado since 1952 and backed by a limited lifetime warranty, this sleeping bag delivers sustainable warmth and trusted performance for the modern outdoor enthusiast.

## Description

desertcart.com : Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, USA, 2024 Model (Regular) : Sports & Outdoors

Review: Warm and packs down well - I bought the Kelty Cosmic Down 20 for fall backpacking trips and so far it has totally exceeded expectations. It kept me warm in temps down to the high 20s °F with just a base layer and a decent sleeping pad. The down insulation lofts up nicely, and I really like the hood and draft collar features—little things that make a big difference on cold nights. It packs down smaller than I expected (fits in my 50L pack with room to spare), and for the price, this is probably one of the best value down bags out there. It's not ultralight, but it's light enough for most weekend or multi-day hikes. Only downside is the mummy shape is a bit snug if you toss and turn. But the footbox has enough space and I still slept comfortably. Highly recommend for 3-season use if you want warmth and quality without breaking the bank.
Review: Tight at the shoulder - Excellent bag, well built, lightweight, and warm, perfect for backpacking. Comfortable down to about freezing (32°f). I am 6' 2" tall, about 26" across at the shoulder. I purchased the long version. Length is good probably fit a guy up to 6' 6". However the bag is "snug" at the shoulder and arms. Not tight per say but not a lot of room eather. Difficult to fully zip and unzip because it is tight with one arm flexed or "bent" in order to zip. If you are a barrel chested, muscular, or husky man you are not going to like this bag. I have taken to using it as a blanket. Otherwise very happy.

## Features

- Recycled Nylon and Recycled Polyester Taffeta
- Imported
- A KELTY CLASSIC: The cosmic 20 has long been a staple of Kelty’s backpacking lineup and a favorite of campers worldwide with 550 FP compressible down, silky soft fabrics, dual direction zippers, the cosmic is built for comfort at the campsite
- PFAS FREE AS IT SHOULD BE: None of that toxic stuff here – Recycled nylon and polyester taffeta shell and liner fabrics to keep even more out of the landfill, finished with durable water repellent. Planet Earth approved
- SUSTAINABLE + TRACEABLE DOWN: Did we mention all our down is 100% ethically sourced and traceable via RDS? Info on product tag to trace each specific batch of down, Kelty means business when it comes to sustainability.
- 1952: Since Eisenhower was in the oval, Kelty has been designing camping gear in sunny Colorado. A founding member of The Conservation Alliance, Kelty continues to lead the industry with quality gear for your outdoor shenanigans on or off the trail
- THE DEETS: Each size up represents additional 6” of total length: Short fits sleepers up to 5’ 6”, Regular 6’, Long 6’ 6”. ISO limit rating 21 degrees, ISO extreme rating -11 degrees. Total weight about 2 lbs. 6 oz. (regular) stuffed size 13 x 7”

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Kelty |
| Color | Dark Blue |
| Occupancy | 1 Person |
| Shape | Mummy |
| Seasons | 3 Seasons |
| Temperature Rating | 20 Degrees |
| Age Range (Description) | Adult |
| Sport | Camping & Hiking, Backpacking |
| Special Feature | RDS Certified Down, Highly Compressible and Lightweight, Recycled Shell + Liner Fabrics |
| Material | PFC-free DWR, [shell] 20D nylon |
| Fill Material | Down |
| Product Dimensions | 78"L x 30"W |
| Closure Type | Zipper |
| Outer Material | Recycled 20D Nylon Taffeta |
| Fabric Type | Recycled Nylon and Recycled Polyester Taffeta |
| Size | Regular |
| Maximum Height Recommendation | 72 Inches |
| UPC | 727880887513 |
| Item Package Dimensions L x W x H | 12.5 x 8 x 7.5 inches |
| Package Weight | 1.16 Kilograms |
| Item Dimensions  LxWxH | 78 x 30 x 3 inches |
| Brand Name | Kelty |
| Warranty Description | Kelty Limited Lifetime Waranty |
| Model Name | Cosmic Down Mummy |
| Suggested Users | unisex-adult |
| Manufacturer | Kelty |
| Part Number | 35413724RR |
| Model Year | 2024 |
| Style | Updated Version |
| Included Components | Kelty Cosmic 20 Sleeping Bag, Kelty Limited Lifetime Warranty, Stuff Sack |
| Fill Material Type | Down |

## Product Details

- **Brand:** Kelty
- **Color:** Dark Blue
- **Occupancy:** 1 Person
- **Shape:** Mummy
- **Seasons:** 3 Seasons
- **Temperature Rating:** 20 Degrees
- **Age Range (Description):** Adult
- **Sport:** Camping & Hiking, Backpacking
- **Special Feature:** RDS Certified Down, Highly Compressible and Lightweight, Recycled Shell + Liner Fabrics
- **Material:** PFC-free DWR, [shell] 20D nylon

## Images

![Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, - Image 1](https://m.media-amazon.com/images/I/51tiHd10hnL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Warm and packs down well
*by J***P on October 21, 2025*

I bought the Kelty Cosmic Down 20 for fall backpacking trips and so far it has totally exceeded expectations. It kept me warm in temps down to the high 20s °F with just a base layer and a decent sleeping pad. The down insulation lofts up nicely, and I really like the hood and draft collar features—little things that make a big difference on cold nights. It packs down smaller than I expected (fits in my 50L pack with room to spare), and for the price, this is probably one of the best value down bags out there. It's not ultralight, but it's light enough for most weekend or multi-day hikes. Only downside is the mummy shape is a bit snug if you toss and turn. But the footbox has enough space and I still slept comfortably. Highly recommend for 3-season use if you want warmth and quality without breaking the bank.

### ⭐⭐⭐⭐⭐ Tight at the shoulder
*by R***N on September 6, 2025*

Excellent bag, well built, lightweight, and warm, perfect for backpacking. Comfortable down to about freezing (32°f). I am 6' 2" tall, about 26" across at the shoulder. I purchased the long version. Length is good probably fit a guy up to 6' 6". However the bag is "snug" at the shoulder and arms. Not tight per say but not a lot of room eather. Difficult to fully zip and unzip because it is tight with one arm flexed or "bent" in order to zip. If you are a barrel chested, muscular, or husky man you are not going to like this bag. I have taken to using it as a blanket. Otherwise very happy.

### ⭐⭐⭐⭐⭐ Perfect!
*by E***E on January 13, 2026*

Don't put in washer!!!! Very cozy and warm and perfect size! Good for backpacking and camping in cold weather.

## Frequently Bought Together

- Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, USA, 2024 Model
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---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-07*