--- product_id: 206884095 title: "Thermarest Mondoking 3d Large Sleep Mat One Size Blue" brand: "therm-a-rest" price: "€ 536.95" currency: EUR in_stock: true reviews_count: 8 category: "Therm A Rest" url: https://www.desertcart.fr/products/206884095-thermarest-mondoking-3d-large-sleep-mat-one-size-blue store_origin: FR region: France --- # TwinLock dual valve system 7.0 R-value extreme insulation 4.25-inch plush thickness Thermarest Mondoking 3d Large Sleep Mat One Size Blue **Brand:** therm-a-rest **Price:** € 536.95 **Availability:** ✅ In Stock ## Summary > 🛌 Elevate your outdoor sleep game—comfort that makes every campsite feel like home. ## Quick Answers - **What is this?** Thermarest Mondoking 3d Large Sleep Mat One Size Blue by therm-a-rest - **How much does it cost?** € 536.95 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/206884095-thermarest-mondoking-3d-large-sleep-mat-one-size-blue) ## Best For - therm-a-rest enthusiasts ## Why This Product - Trusted therm-a-rest brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Spacious & Stable:** Large 77x25 inch surface maximizes usable sleep area, perfect for solo luxury or pairing with a second pad for couples. - • **Sleep Like Royalty:** Ultra-plush 4.25-inch thickness with 3D vertical sidewalls for unmatched comfort under the stars. - • **Compact & Travel-Ready:** Compresses down to a sleek 26x10.3 inches with included stuff sack—ideal for car camping and basecamps. - • **Effortless Setup & Pack Down:** TwinLock valve system with dedicated inflate/deflate valves means no-fuss, quick camp transitions. - • **Warmth That Defies the Elements:** 7.0 R-value StrataCore insulation keeps you cozy in the coldest conditions—camp all year round without compromise. ## Overview The Therm-a-Rest MondoKing 3D Large Sleep Mat is a premium self-inflating camping mattress designed for maximum comfort and insulation. Featuring a 4.25-inch thick plush foam core with innovative StrataCore construction, it delivers a 7.0 R-value for superior warmth in extreme conditions. The TwinLock valve system simplifies inflation and deflation, while the large 77x25 inch size offers ample sleeping space. Compact and lightweight for car camping, it includes a pump sack and stuff sack, backed by a limited lifetime warranty and proudly made in the USA. ## Description Product Description Sleep like camp royalty with the ultra luxurious Therm-a-Rest MondoKing 3D Self-Inflating Foam Camping Mattress. With couples in mind, the pad can be paired with a second MondoKing for a double sleeping pad. The pad offers an R-value of 8.0 for maximum year-round comfort thanks to thick thermal foam and StrataCore construction, which uses a continuous layer of thermal foam nestled between alternating ridges of air and foam (R-value measures the material’s ability to insulate; the higher the R-value, the warmer the sleeping pad). Perfect for car camping, expedition basecamps, RVs, and boats, it also makes an excellent guest bed at home. The stable mattress offers maximum stability, cushioning, and protection from rocks, roots, and uneven ground surfaces. All styles have dual valves that allow compressible foam core to expand and inflate when unpacked, and all styles mate perfectly with other Therm-a-Rest MondoKing mattresses with a similar style. Available in three styles: Equipped with the Standard Valve with the 2018 or 2019 model, or equipped with the TwinLock Valve the sleeping pad has dedicated "in" and "out" valves to make inflating and deflating the pad easier than ever. Standard Valve models are 4.0 inches thick inflated and include a stuff sack, and TwinLock Valve models are 4.5 inches thick inflated and include a stuff sack that can also be used as a pump sack (for easier, breath-free pad inflation). Made in the USA. Manufacturer’s limited lifetime warranty. Safety Warning Do not exceed the maximum weight of 250 lbs. Inflate fully before first use and leave inflated for 2-4 hours. Review: Super comfy - The most comfortable camping bed I've found, it's big and bulky but meant for car camping rather than carrying in a pack. Pair it with aa flex tail pump to fill it and in minutes you have a warm and comfortable bed ready! Review: super comfortable - I am a large person, I bought this with some trepidation. I needn't have worried - it is fantastically comfortable, as per the hype and the price, and is the best camping bed I have ever slept on. downsides: for the high price there are zero accessories. I expected a puncture repair kit at the very least and maybe a pump sack to inflate it (both available separately of course) but there was nothing. an oversight on my specific purchase or profit maximising? ## Features - Camp like royalty with the MondoKing 3D, an ultra-comfy 4.25-inch thick sleeping pad with a stretch knit fabric layer for resting better under the stars - Utilizing two one-way valves, one for inflation and one for deflation, the TwinLock valve system makes setting up and breaking camp a breeze - 7.0 R-value insulates in the most extreme conditions using StrataCore construction that utilizes a continuous layer of thermal foam nestled between alternating ridges of air and foam - 3D construction creates vertical sidewalls to maximize useable sleep surface and comfort - StrataCore construction allows the pad to easily compress and pack away to a compact 26x10.3 inches in included storage sack - For best performance, inflate your self-inflating pad with air by breath or included pump sack and leave the mattress fully inflated for 2-4 hours before your first use. - Large size measures 77x25x4.25 inches, 26x10.3 inches rolled, and weighs 4.38 pounds; stuff sack/pump sack included; limited lifetime warranty; made in the USA ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YFXYF9W | | Benefits | Maximum comfort and support with premium foam and three-dimensional construction | | Best Sellers Rank | 30,703 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 58 in Self-Inflating Sleeping Mats for Camping | | Brand | Therm-a-Rest | | Brand Name | Therm-a-Rest | | Capacity | 653.17 kg | | Colour | Lyons Blue | | Construction Type | StrataCore Construction | | Cover Material | Polyester | | Customer Reviews | 4.4 out of 5 stars 808 Reviews | | Fill Material | Air | | Global Trade Identification Number | 00040818132258 | | Included Components | Carry Bag, Pump bag, Sleeping mat, Transport bag | | Item Depth | 4.25 inches | | Item Dimensions | 195.6 x 63.5 x 10.2 centimetres | | Item Dimensions L x W x Thickness | 2L x 0.64W x 0.11Th metres | | Item Firmness Description | Plush | | Item Thickness | 10.8 Centimetres | | Item Type Name | Self-Inflating Camping Sleeping Pad | | Item Weight | 1.99 Kilograms | | Manufacturer | Therm-a-Rest | | Material | Foam | | Material Type | Foam | | Mattress Coil Type | Micro Coil | | Mattress Comfort Layer Material | Comfort Foam | | Model Name | MondoKing 3D | | Model Number | 040818132258 | | Number of Items | 1 | | Number of Layers | 3 | | Product Care Instructions | Wipe With Damp Cloth | | Product dimensions | 2L x 0.64W x 0.11Th metres | | Size | Large - 77 x 25 Inches | | Special Features | Inflatable | | Special feature | Inflatable | | Specific Uses For Product | Sleeping Pad | | Target Audience | Adult | | UPC | 040818132258 | | Unit Count | 1.0 count | | Water Resistance Level | Water Resistant | | Weight Capacity Maximum | 250 Pounds | ## Product Details - **Brand:** Therm-a-Rest - **Colour:** Lyons Blue - **Included components:** Carry Bag, Pump bag, Sleeping mat, Transport bag - **Item weight:** 1.99 Kilograms - **Material:** Foam - **Product dimensions:** 2L x 0.64W x 0.11Th metres - **Size:** Large - 77 x 25 Inches - **Special feature:** Inflatable - **Specific uses for product:** Sleeping Pad - **Target audience:** Adult ## Images ![Thermarest Mondoking 3d Large Sleep Mat One Size Blue - Image 1](https://m.media-amazon.com/images/I/61OfvMF8y-L.jpg) ## Questions & Answers **Q: How is this temperature in summer?** A: The R rating is regarding insulation. The Therm,-a-rest doesn't actually provide heat, just protection from the cold. I used mine on a 3,000 mile motorcycle trip last summer and felt extremely comfortable every night (although I did buy a cooler sleeping bag for the hotter states). **Q: What size dry bag would you use for size L?** A: Look at the dimensions listed on the sites information also not sure if you need a dry bag this is waterproof **Q: The sleeping bench in my travel trailer is 75" long and 27" wide. Do you think this could fit lengthwise?** A: Hi Terry - No, the Large Therm-A-Rest MondoKing 3D would not fit as it's 77" long when inflated. The mattress is 4" thick, so if it's constrained by the length of the space it will be in, it will either want to roll up at either end or buckle in the middle somewhere, and that could be uncomfortable. The Therm-A-Rest Customer Support Team **Q: Why does the bag it comes with have a valve?** A: The bag is a pump sack/stuff sack combo. The valve on the bag is to connect to the stuff sack to help w/inflation. Thermarest Customer Service. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Super comfy *by T***S on 29 April 2025* The most comfortable camping bed I've found, it's big and bulky but meant for car camping rather than carrying in a pack. Pair it with aa flex tail pump to fill it and in minutes you have a warm and comfortable bed ready! ### ⭐⭐⭐⭐⭐ super comfortable *by M***L on 27 July 2023* I am a large person, I bought this with some trepidation. I needn't have worried - it is fantastically comfortable, as per the hype and the price, and is the best camping bed I have ever slept on. downsides: for the high price there are zero accessories. I expected a puncture repair kit at the very least and maybe a pump sack to inflate it (both available separately of course) but there was nothing. an oversight on my specific purchase or profit maximising? ### ⭐⭐⭐⭐⭐ Super comfortable *by M***R on 25 September 2024* Comfort 10/10 Warmth is excellent and there is little chance of cold ground affecting sleep. Only drawback is size but that’s the trade off for a quality night of sleep. Better constructed than other sleep mats and screams quality which almost justified the price! ## Frequently Bought Together - Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad - Therm-a-Rest NeoAir Micro Electric Air Pump for Sleeping Pads ,Black - Therm-a-Rest Synergy Luxe Mattress Sheet --- ## 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.fr/products/206884095-thermarest-mondoking-3d-large-sleep-mat-one-size-blue](https://www.desertcart.fr/products/206884095-thermarest-mondoking-3d-large-sleep-mat-one-size-blue) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-11-11*