---
product_id: 721595785
title: "Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included"
brand: "kelty"
price: "€ 428.96"
currency: EUR
in_stock: true
reviews_count: 5
category: "Kelty"
url: https://www.desertcart.hr/products/721595785-kelty-cosmic-synthetic-fill-20-degree-backpacking-sleeping-bag-compression
store_origin: HR
region: Croatia
---

# Integrated compression stuff sack for packability Spacious footbox fits sleepers up to 6ft 20°F temp rating for cold nights Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included

**Brand:** kelty
**Price:** € 428.96
**Availability:** ✅ In Stock

## Summary

> 🔥 Sleep Warm, Pack Smart, Adventure Hard 🎒

## Quick Answers

- **What is this?** Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included by kelty
- **How much does it cost?** € 428.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/721595785-kelty-cosmic-synthetic-fill-20-degree-backpacking-sleeping-bag-compression)

## 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

- • **Room to Wiggle:** Tailored fit with a roomy footbox and length options up to 6’6” means no more cramped toes after a long day.
- • **Stay Toasty in 20°F:** Cirroloft synthetic insulation locks in warmth even in damp conditions—no cold spots, just cozy nights.
- • **Pack Light, Sleep Tight:** Integrated compression straps and stuff sack shrink your gear to minimalist backpacking standards—trail weight under 3 lbs.
- • **Smart Storage On-the-Go:** External stash pocket keeps your essentials close, so you’re always ready for those midnight snack cravings or headlamp grabs.
- • **Durability Meets Comfort:** Soft nylon taffeta shell resists tears while feeling silky smooth against your skin—built to last through rugged adventures.

## Overview

The Kelty Cosmic Synthetic Fill 20 Degree Sleeping Bag is a lightweight, durable mummy bag designed for three-season backpacking. Featuring Cirroloft synthetic insulation, it offers reliable warmth down to 20°F while maintaining compressibility with integrated compression straps and a stuff sack. Its tailored fit accommodates sleepers up to 6 feet tall with a spacious footbox and includes an external stash pocket for convenience. Crafted with soft nylon taffeta, this bag balances comfort and rugged durability for serious outdoor enthusiasts.

## Description

Let’s face it- when is backpacking ever actually easy? While we can’t take the pain out of your elevation gain, we can put you on the trail with the new Cosmic Synthetic sleeping bag. It’s a fully equipped mummy bag that’s light on weight and your wallet. The Cosmic Synthetic is a three-season superstar built with our new Cirroloft Synthetic Insulation for lightweight, compressible warmth. Soft-as-silk nylon taffeta fabric means you’ll be thinking less about weary hiker feet and daydreaming about more QT in the outdoors.

Review: Amazing product. Kept me warm and comfortable in the mountains in >30°. Strong material, no tears on sleeping bag. Didn’t feel claustrophobic. A bit bigger and bulkier than I would prefer but still worked amazing.
Review: Realmente se que sería un muy buen producto, y lo es. Súper calientito, se puede hacer lo más pequeño que logres hacerlo, las correas ayudan bastante, y el diseño esta súper padre

## Features

- 20 Degree Temp Rating, Regular Size: Fits sleepers up to 6ft, fill weight 30. 5oz, total weight 2lbs 13oz, stuff size (non-compressed) 16x9 inches. Color: Tapestry Blue/Smoke
- Packability: Integrated compression stuff sack, coupled with the premium packability of the synthetic fill allow the Cosmic synthetic to reach minimalist standards of backpacking gear. Trail weight varies by temp rating, from 2lbs 6oz to 4lbs 11oz.
- Insulation: Cirroloft synthetic insulation provides reliable warmth in cold and damp conditions, maintains loft for even coverage with no cold spots. Temperature ratings from 0 degrees to 40 degrees, to ensure your time on the trail is comfortable.
- Tailored Fit: Natural fit spacious footbox gives more room to wiggle your toes, and length options range to fit sleepers 5’8” to 6’6”. A handy stash pocket on the exterior of the bag for your overnight goodies and essentials in the tent.
- Kelty Craftsmanship: Kelty is synonymous with quality in the outdoor community. Kelty gear is built for play, and built to last. The Cosmic Synthetic bag is ready to be put through the ringer on the trail, campground, and everywhere in between.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DPNJQ3Z6 |
| Age range | Adult |
| Best Sellers Rank | 146,218 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 175 in Mummy Sleeping Bags |
| Brand | Kelty |
| Color | Dark Blue |
| Customer Reviews | 4.2 4.2 out of 5 stars (141) |
| Date First Available | 19 Feb. 2025 |
| Department | Unisex |
| Fill material | Synthetic |
| Height | 10 inches |
| Insulation material | Synthetic |
| Item display length | 22 inches |
| Item display width | 14 inches |
| Item model number | 35428625RR |
| Manufacturer | Kelty |
| Material type | Nylon |
| Maximum height recommendation | 6 Feet |
| Outer material | Nylon |
| Product Dimensions | 182.88 x 71.12 x 7.62 cm; 1.47 kg |
| Seasons | 3 Seasons |
| Shape | Mummy |
| Size | Standard |
| Style | Regular (2025) |

## Product Details

- **Age range (description):** Adult
- **Brand:** Kelty
- **Closure type:** Zipper
- **Colour:** Dark Blue
- **Fill material:** Synthetic
- **Material:** Nylon
- **Occupancy:** 1 Person
- **Product dimensions:** 182.9L x 71.1W centimetres
- **Seasons:** 3 Seasons
- **Shape:** Mummy

## Images

![Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included - Image 1](https://m.media-amazon.com/images/I/41MwHaayiCL.jpg)
![Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included - Image 2](https://m.media-amazon.com/images/I/512LZrg+r0L.jpg)
![Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included - Image 3](https://m.media-amazon.com/images/I/51bjBgQP1gL.jpg)
![Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included - Image 4](https://m.media-amazon.com/images/I/610F5nOh78L.jpg)
![Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag – Compression Straps, Stuff Sack Included - Image 5](https://m.media-amazon.com/images/I/61GTrYwAL8L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***V on 10 November 2025*

Amazing product. Kept me warm and comfortable in the mountains in >30°. Strong material, no tears on sleeping bag. Didn’t feel claustrophobic. A bit bigger and bulkier than I would prefer but still worked amazing.

### ⭐⭐⭐⭐⭐ Review
*by V***A on 26 November 2023*

Realmente se que sería un muy buen producto, y lo es. Súper calientito, se puede hacer lo más pequeño que logres hacerlo, las correas ayudan bastante, y el diseño esta súper padre

### ⭐⭐⭐⭐ Review
*by D***P on 3 December 2024*

Review: Kelty Cosmic Synthetic Fill 20 Degree Sleeping Bag The Kelty Cosmic 20 Degree Sleeping Bag is a great option for campers and backpackers needing warmth, portability, and versatility for cooler nights. Pros: • Warmth: Rated for 20°F and perfect for colder conditions. Works great in 35–40°F weather with fleece pants and a shirt. • Lightweight & Compact: Easy to pack with included compression straps and stuff sack. • Durable Material: Synthetic fill is resilient and handles damp conditions well. • Convenient Zipper Design: Allows you to unzip the bottom to let your legs out when it gets too warm—a very handy feature. Cons: • Tight Fit: May feel snug for larger users. • Less Breathable: Can feel warm and stuffy in milder weather without ventilation. Verdict: A reliable and versatile sleeping bag for backpackers, especially for temperatures around 35–40°F. The leg-vent feature is a thoughtful touch for added comfort. Rating: 4.5/5

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**Shop now:** [https://www.desertcart.hr/products/721595785-kelty-cosmic-synthetic-fill-20-degree-backpacking-sleeping-bag-compression](https://www.desertcart.hr/products/721595785-kelty-cosmic-synthetic-fill-20-degree-backpacking-sleeping-bag-compression)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-03*