---
product_id: 651257574
title: "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"
brand: "kelty"
price: "18430816₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Kelty"
url: https://www.desertcart.vn/products/651257574-cosmic-20-down-mummy-sleeping-bag-for-backpacking-campers-550
store_origin: VN
region: Vietnam
---

# 550 Fill Power Down Recycled Nylon & Polyester ISO Limit 21°F / Extreme -11°F 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

**Brand:** kelty
**Price:** 18430816₫
**Availability:** ✅ In Stock

## Summary

> 🌿 Sleep Green, Trek Clean — The Cosmic 20 is your eco-friendly warmth essential!

## 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, USA, 2024 Model by kelty
- **How much does it cost?** 18430816₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/651257574-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

- • **Traceable Ethical Down:** 100% RDS-certified down with batch traceability ensures transparency and responsible sourcing.
- • **Pack Smart, Travel Light:** Compressible design fits easily into your backpack, weighing just over 2 lbs for effortless carry.
- • **Tailored for Trail Comfort:** Mummy shape with draft collar and dual-direction zippers keeps cold air out and warmth locked in.
- • **Eco-Conscious Craftsmanship:** Made with recycled fabrics and PFAS-free durable water repellent, because your gear should protect the planet too.
- • **Sustainably Warm & Lightweight:** 550 fill power down insulation delivers cozy warmth without bulk, perfect for 3-season adventures.

## Overview

The Kelty Cosmic 20 Down Sleeping Bag is a 3-season, lightweight mummy bag featuring 550 fill power ethically sourced down, recycled nylon and polyester shell with PFAS-free water repellent finish. Designed in Colorado, it offers ISO-rated warmth down to 21°F (limit) and -11°F (extreme), with a compressible, packable design ideal for backpackers seeking sustainable comfort and reliable performance.

## Description

Shop 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). Free delivery and returns on all eligible orders.

Review: 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: 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

- 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 |
| Age range | Adult |
| Batteries included? | No |
| Best Sellers Rank | 42,937 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 47 in Mummy Sleeping Bags |
| Brand | Kelty |
| Color | Deep Teal |
| Customer Reviews | 4.7 4.7 out of 5 stars (265) |
| Date First Available | 18 Feb. 2024 |
| Department | Unisex |
| Features | Highly Compressible and Lightweight, RDS Certified Down, Recycled Shell + Liner Fabrics |
| Fill material | Down |
| Height | 9 inches |
| Included components | Kelty Cosmic 20 Sleeping Bag, Kelty Limited Lifetime Warranty, Stuff Sack |
| Insulation material | Down |
| Item display length | 11 inches |
| Item display width | 19 inches |
| Item model number | Kelty |
| Manufacturer | Kelty |
| Material type | Nylon, Polyester |
| Maximum height recommendation | 72 Inches |
| Number of items | 1 |
| Outer material | Recycled 20D Nylon Taffeta |
| Product Dimensions | 198.12 x 76.2 x 7.62 cm; 1.15 kg |
| Seasons | 3 Seasons |
| Shape | Mummy |
| Size | Standard |
| Sport | Camping & Hiking, Backpacking |
| Style | Updated Version |

## Product Details

- **Age range (description):** Adult
- **Brand:** Kelty
- **Colour:** Deep Teal
- **Material:** Nylon, Polyester
- **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

![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 - Image 1](https://m.media-amazon.com/images/I/51tiHd10hnL.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/618+2iinn4L.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/71mSOGtZVsL.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/71JnpvKQNJL.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/71NZgIQE92L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***P on 21 October 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.

### ⭐⭐⭐⭐⭐ Review
*by R***N on 6 September 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.

### ⭐⭐⭐⭐⭐ Review
*by B***O on 5 February 2026*

Very warm, high quality bag! I’ve owned several sleeping bags and I got this as a spare but I wanted to try it out and was very pleasantly surprised! Not only was the stitching and zipper high quality, but it retained heat much better than I expected for how light it is. 10/10 would recommend to anyone in need of a sleeping bag!

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-06-02*