---
product_id: 206884095
title: "Thermarest Mondoking 3d Large Sleep Mat One Size Blue"
brand: "therm-a-rest"
price: "€ 603.42"
currency: EUR
in_stock: true
reviews_count: 13
category: "Therm A Rest"
url: https://www.desertcart.nl/products/206884095-thermarest-mondoking-3d-large-sleep-mat-one-size-blue
store_origin: NL
region: Netherlands
---

# 7.0 R-value extreme insulation TwinLock dual valve system 4.25-inch plush thickness Thermarest Mondoking 3d Large Sleep Mat One Size Blue

**Brand:** therm-a-rest
**Price:** € 603.42
**Availability:** ✅ In Stock

## Summary

> 🛌 Elevate your outdoor sleep game — because roughing it shouldn’t mean roughing out!

## Quick Answers

- **What is this?** Thermarest Mondoking 3d Large Sleep Mat One Size Blue by therm-a-rest
- **How much does it cost?** € 603.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/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

- • **Pack & Go Ready:** Compresses down to a compact 26x10.3 inches with included stuff sack for easy transport
- • **Effortless Setup:** TwinLock valve system with separate inflate/deflate valves for quick camp transitions
- • **Year-Round Warmth:** 7.0 R-value StrataCore insulation keeps you cozy in the harshest conditions
- • **Sleep Like Royalty:** Ultra-plush 4.25-inch thickness cushions you like a cloud under the stars
- • **Maximized Comfort Surface:** 3D vertical sidewalls expand usable sleep area for unmatched stability and support

## 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 foam core with advanced StrataCore construction, it delivers a 7.0 R-value for superior warmth in extreme conditions. Its innovative TwinLock valve system simplifies inflation and deflation, while the 3D vertical sidewalls maximize usable sleeping surface. Compact and lightweight at 4.38 pounds, it’s perfect for car camping, basecamps, and even as a luxury guest bed. Made in the USA with a limited lifetime warranty, it’s the ultimate upgrade for campers who refuse to compromise on sleep quality.

## 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 comfortable - 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!
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 |
| Best Sellers Rank | 104,321 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 218 in Self-Inflating Sleeping Mats for Camping |
| Brand | Therm-a-Rest |
| Capacity | 653.17 kg |
| Colour | Lyons Blue |
| Customer Reviews | 4.2 4.2 out of 5 stars (805) |
| Date First Available | 30 Sept. 2019 |
| Item Weight | 1.99 kg |
| Maximum Weight Capacity | 250 Pounds |
| Model Number | 040818132258 |
| Product Dimensions | 195.58 x 63.5 x 10.16 cm; 1.99 kg |
| Special Features | Inflatable |

## 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 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!

### ⭐⭐⭐⭐⭐ 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 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!

## 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

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-12*