---
product_id: 610552247
title: "Kelty 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: "HK$2692"
currency: HKD
in_stock: true
reviews_count: 8
category: "Kelty"
url: https://www.desertcart.hk/products/610552247-kelty-cosmic-20-down-mummy-sleeping-bag-for-backpacking-campers
store_origin: HK
region: Hong Kong
---

# 550 Fill Power Down Recycled Nylon & Polyester PFAS-Free Durable Water Repellent Kelty 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:** HK$2692
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay Warm, Pack Light, Tread Lightly ♻️

## Quick Answers

- **What is this?** Kelty 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?** HK$2692 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/610552247-kelty-cosmic-20-down-mummy-sleeping-bag-for-backpacking-campers)

## 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

- • **Compact Powerhouse:** Lightweight at just 2.6 lbs and highly compressible, it fits effortlessly into your pack without sacrificing warmth.
- • **Eco-Chic Durability:** Crafted from recycled nylon and polyester taffeta with PFAS-free DWR, combining sustainability with rugged weather resistance.
- • **Colorado Crafted Legacy:** Designed since 1952 in sunny Colorado, backed by Kelty’s limited lifetime warranty—gear up with trusted outdoor innovation.
- • **Tailored Fit for Trailblazers:** Mummy shape with trapezoidal baffle design and expanded footbox delivers cozy heat retention and freedom of movement.
- • **Ethical Warmth, Traceable Comfort:** RDS-certified 550 fill power down ensures premium warmth with full traceability for conscious adventurers.

## Overview

The Kelty Cosmic 20 Down Sleeping Bag is a 3-season, ethically sourced, and eco-friendly mummy bag featuring 550 fill power down insulation, recycled shell and liner fabrics with PFAS-free water repellent treatment. Weighing just 2.6 pounds and designed with a heat-retaining trapezoidal baffle and expanded footbox, it offers superior warmth and comfort for backpackers and campers. Crafted in Colorado since 1952, it combines heritage quality with modern sustainability.

## Description

Remember the trapezoid from high school geometry? Turns out, this funky ol' shape is ideal for helping sleeping bags retain heat. Our trapezoidal baffle construction is just one of the reasons the Cosmic Down is still our favorite three-season superstar. We also love the expanded natural-fit footbox for happier feet, zippered stash pocket and fully recycled fabrics and PFAS-free DWR treatment. The Cosmic Down is the total package.

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: Warm and compact sleeping bag! - I was skeptical about the sleeping bag because of how small it is, but it keeps me really warm. I love sleeping in the cold with a warm blanket and the sleeping bag kept me nice and toasty. The zipper is really easy to zip up in the dark is good quality. It rolls up super small and fits in the saddlebag of my motorcycle.

## 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 |
|---------------|-------|
| ASIN | B0CSPKCJZK |
| Additional Features | Highly Compressible and Lightweight, RDS Certified Down, Recycled Shell + Liner Fabrics |
| Age Range Description | Adult |
| Best Sellers Rank | #13,062 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #45 in Camping Sleeping Bags |
| Brand | Kelty |
| Brand Name | Kelty |
| Closure Type | Zipper |
| Color | Dark Blue |
| Customer Reviews | 4.6 out of 5 stars 109 Reviews |
| Fabric Type | Recycled Nylon and Recycled Polyester Taffeta |
| Fill Material Type | Down |
| Included Components | Kelty Cosmic 20 Sleeping Bag, Kelty Limited Lifetime Warranty, Stuff Sack |
| Item Dimensions L x W | 78"L x 30"W |
| Item Type Name | Down Sleeping Bag |
| Item Weight | 2.6 pounds |
| Manufacturer | Kelty |
| Manufacturer Part Number | 35413724RR |
| Material | PFC-free DWR, [lining] 50D polyester, [shell] 20D nylon |
| Maximum Height Recommendation | 72 inches |
| Model Number | Kelty |
| Number of Items | 1 |
| Number of Packs | 1 |
| Occupancy | 1 Person |
| Seasons | 3 Seasons |
| Shape | Mummy |
| ShellMaterial | Recycled 20D Nylon Taffeta |
| Size | Standard |
| Sport Type | Camping & Hiking, Backpacking |
| Temperature Rating | 20 Degrees |
| UPC | 727880887513 |
| Unit Count | 1 Count |
| Warranty Description | Kelty Limited Lifetime Waranty |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Kelty
- **Color:** Dark Blue
- **Material:** PFC-free DWR, [lining] 50D polyester, [shell] 20D nylon
- **Occupancy:** 1 Person
- **Seasons:** 3 Seasons
- **Shape:** Mummy
- **Special Feature:** Highly Compressible and Lightweight, RDS Certified Down, Recycled Shell + Liner Fabrics
- **Sport:** Camping & Hiking, Backpacking
- **Temperature Rating:** 20 Degrees

## Images

![Kelty 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)
![Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, - Image 2](https://m.media-amazon.com/images/I/618+2iinn4L.jpg)
![Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, - Image 3](https://m.media-amazon.com/images/I/71mSOGtZVsL.jpg)
![Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, - Image 4](https://m.media-amazon.com/images/I/71JnpvKQNJL.jpg)
![Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, - Image 5](https://m.media-amazon.com/images/I/71NZgIQE92L.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.

### ⭐⭐⭐⭐⭐ Warm and compact sleeping bag!
*by J***N on March 12, 2026*

I was skeptical about the sleeping bag because of how small it is, but it keeps me really warm. I love sleeping in the cold with a warm blanket and the sleeping bag kept me nice and toasty. The zipper is really easy to zip up in the dark is good quality. It rolls up super small and fits in the saddlebag of my motorcycle.

### ⭐⭐⭐⭐⭐ The best sleeping bag!
*by K***E on April 28, 2026*

Omg my son loves this sleeping bag! We got it for camping and he loved it so much it’s now on his bed all the time. It’s so light weight but SO warm. It’s packs down into practically nothing. Highly recommend!

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-09-16*