--- product_id: 222564937 title: "Envelope Sleeping Bag 3 Season Extra Warm Waterproof Advanced Heat Control System – Ideal for Camping Backpacking Hiking Festivals Twin System" brand: "keenflex" price: "2077 Ft" currency: HUF in_stock: false url: https://www.desertcart.hu/products/222564937-envelope-sleeping-bag-3-season-extra-warm-waterproof-advanced-heat store_origin: HU region: Hungary --- # Generous 210x80cm roomy size Dual zips for customizable airflow Certified -11.7°C extreme temp Envelope Sleeping Bag 3 Season Extra Warm Waterproof Advanced Heat Control System – Ideal for Camping Backpacking Hiking Festivals Twin System **Brand:** keenflex **Price:** 2077 Ft **Availability:** ❌ Out of Stock ## Summary > 🌄 Sleep smart, camp bold — your 3-season comfort zone awaits! ## Quick Answers - **What is this?** Envelope Sleeping Bag 3 Season Extra Warm Waterproof Advanced Heat Control System – Ideal for Camping Backpacking Hiking Festivals Twin System by keenflex - **How much does it cost?** 2077 Ft with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/222564937-envelope-sleeping-bag-3-season-extra-warm-waterproof-advanced-heat) ## Best For - keenflex enthusiasts ## Why This Product - Trusted keenflex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Master Your Climate:** Dual zippers let you regulate warmth effortlessly—open both sides for cool nights or zip up tight when temps drop. - • **Tested Tough for 3 Seasons:** Lab-certified to keep you cozy from 7.2°C down to -11.7°C, perfect for spring through autumn adventures. - • **Sleep Spaciously, Dream Freely:** Envelope design offers XL roominess for ultimate comfort beyond mummy bags. - • **Effortless Access & Packability:** Zips open from inside and outside for easy entry/exit, plus comes with a compression bag for neat storage. - • **Cloud-Like Comfort Meets Durability:** Twin-layer fabric blends soft cotton-like interior with water-resistant, anti-tear polyester exterior. ## Overview The KEENFLEX Envelope Sleeping Bag 3 Season is a spacious, lab-tested sleeping solution designed for spring to autumn camping. Featuring a roomy 210x80cm envelope shape, dual zippers for personalized ventilation, and a durable twin-fabric construction, it balances warmth down to -11.7°C with breathable comfort. Ideal for professional adventurers seeking reliable, versatile gear that elevates every outdoor night. ## Description Shop KeenFlex Envelope Sleeping Bag 3 Season Extra Warm Waterproof Advanced Heat Control System – Ideal for Camping Backpacking Hiking Festivals Twin System. Free delivery and returns on all eligible orders. ## Features - 3 Season Temperature-​ The KEENFLEX envelope sleeping bag has been laboratory tested in line with the latest global standards (EN ISO 23537-1:2016) with a certified extreme temperature of -11.7 °C and comfortable sleeping from 7.2​ ​°C. Perfect for spring, summer, and autumn camping. - Generous Size -​ Sleep like you’re at home under your duvet! Our envelope design is much roomier than mummy sleeping bags at 210cm by 80cm. There’s space to move around and get truly comfortable, no matter how you like to sleep. - Dual Zips -​ We have eliminated RH and LH sleeping bags: our dual zipper lets all campers adjust BOTH sides of their sleeping bag. In warmer weather, open both zips for a cooler sleep—something that’s frustrating and impossible with mummy sleeping bags. - Twin Fabric -​ The comfort of clouds with the strength of graphene! The outer layer is made from a light, anti-tear diamond-shaped polyester while the inside has a warm, soft cotton-like feel. Water resistant, strong, and always breathable. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B089SV9JTH | | Age Range Description | Adult | | Brand Name | KeenFlex | | Closure Type | Zipper | | Colour | Orange | | Customer Reviews | 4.5 4.5 out of 5 stars (617) | | Fabric Type | Polyester | | Fill Material Type | Polyester | | Included Components | Compression Bag | | Item Dimensions L x W | 2.1L x 0.8W metres | | Item Shape | Envelope | | Item Type Name | Envelope Sleeping Bag | | Item Weight | 1.5 Kilograms | | Manufacturer | KeenFlex | | Manufacturer Warranty Description | 2 | | Material | Polyester | | Occupancy | 2 Person | | Outer Material Type | Polyester | | Seasons | 3 Seasons | | Size | XL | | Special Features | Dual-layer Twin Fabric with Adjustable Dual Zips | | Sport Type | Backpacking, Camping and Hiking | ## Product Details - **Age range (description):** Adult - **Brand:** KeenFlex - **Colour:** Orange - **Fill material:** Polyester - **Material:** Polyester - **Occupancy:** 2 Person - **Seasons:** 3 Seasons - **Shape:** Envelope - **Special feature:** Dual-layer Twin Fabric with Adjustable Dual Zips - **Sport:** Backpacking, Camping and Hiking ## Images ![Envelope Sleeping Bag 3 Season Extra Warm Waterproof Advanced Heat Control System – Ideal for Camping Backpacking Hiking Festivals Twin System - Image 1](https://m.media-amazon.com/images/I/71aczXEbn0L.jpg) ## Available Options This product comes in different **Colour Name** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hu/products/222564937-envelope-sleeping-bag-3-season-extra-warm-waterproof-advanced-heat](https://www.desertcart.hu/products/222564937-envelope-sleeping-bag-3-season-extra-warm-waterproof-advanced-heat) --- *Product available on Desertcart Hungary* *Store origin: HU* *Last updated: 2026-11-04*