---
product_id: 661521010
title: "Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad"
brand: "therm-a-rest"
price: "$798.08"
currency: USD
in_stock: true
reviews_count: 8
category: "Therm A Rest"
url: https://www.desertcart.us/products/661521010-therm-a-rest-mondoking-3d-self-inflating-camping-sleeping-pad
store_origin: US
region: United States of America
---

# Compact 26x10.3 inch pack size 7.0 R-value extreme insulation 4.25-inch plush thickness Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad

**Brand:** therm-a-rest
**Price:** $798.08
**Availability:** ✅ In Stock

## Summary

> 🛌 Elevate your outdoor sleep game—because roughing it shouldn’t mean roughing up your rest.

## Quick Answers

- **What is this?** Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad by therm-a-rest
- **How much does it cost?** $798.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/661521010-therm-a-rest-mondoking-3d-self-inflating-camping-sleeping-pad)

## 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

- • **Set Up in a Snap:** TwinLock valve system with dual one-way valves for effortless inflation and deflation—camp faster, relax sooner.
- • **Pack Light, Camp Heavy:** Compresses down to a compact 26x10.3 inches in a PFAS-free sack—perfect for car campers who demand comfort without bulk.
- • **Maximized Sleep Surface:** 3D vertical sidewalls expand usable space, giving you room to stretch out and sleep soundly.
- • **Conquer Extreme Conditions:** 7.0 R-value StrataCore insulation keeps you warm in the coldest nights, so no adventure is off limits.
- • **Sleep Like Royalty Under the Stars:** Ultra-plush 4.25-inch thickness with stretch knit fabric for cloud-like comfort anywhere.

## Overview

The Therm-a-Rest MondoKing 3D is an XX-Large, self-inflating camping sleeping pad featuring a 4.25-inch thick comfort foam layer with stretch knit fabric, a TwinLock valve system for quick setup, and a 7.0 R-value StrataCore insulation for extreme weather. Its 3D construction maximizes usable sleep surface, while compressing to a compact size for easy transport. Weighing 5.5 pounds and supporting up to 1440 pounds, it’s designed for premium comfort and durability with a limited lifetime warranty.

## 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 7.0 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. Equipped with the TwinLock Valve the sleeping pad has dedicated "in" and "out" valves to make inflating and deflating the pad easier than ever. The MondoKing 3D is 4.25 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.

Review: Amazing comfort - This is one amazing air mattress. I have never liked sleeping on air mattresses. This one is a game changer. I am 300lbs and it was so comfortable I slept better on this than on my own bed. Five stars. Highly recommend!!!!
Review: Best camping sleep for the money. - The only thing I dislike about this, is that it didn't exist sooner. 😂 Easily the best camping air mattress I've ever used. It felt like sleeping in my own bed, because of the foam, it's great. I slept well, all night, on the ground, in the woods. No tossing and turning, and I felt rested in the morning. It's not loud or makes weird noises when you move around on it, and it feels soft to the touch instead of plastic or something. It will basically self inflate, but the bag it's stored in can be used as a pump, which is neat, but I bought the tiny pump for it. Inflates in under 10 minutes I think. It's a bit bulky, not for backpacking but if your worried about your back and want to camp, use this mattress, my 75yo dad approves. 👍 It seems well built and can support my fat butt so I recon it will yours too, and be comfy. 🥰

## 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 PFAS-free 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
- XX-Large size measures 80x30x4.25 inches, 31x10.3 inches rolled, and weighs 5.5 pounds; stuff sack/pump sack included; limited lifetime warranty; made in the USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CQRVCFH8 |
| Additional Features | Anti-Deflate, Inflatable, Portable |
| Best Sellers Rank | #32,200 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #54 in Camping Air Mattresses |
| Brand | Therm-a-Rest |
| Brand Name | Therm-a-Rest |
| Capacity | 1440 Pounds |
| Color | Marine Blue |
| Construction Type | Self-Inflating Foam |
| Cover Material | Polyester |
| Customer Reviews | 4.4 out of 5 stars 881 Reviews |
| Fill Material | Foam |
| Global Trade Identification Number | 00040818140215 |
| Included Components | Pump Sack |
| Item Dimensions | 80 x 30 x 4.25 inches |
| Item Dimensions L x W x Thickness | 80"L x 30"W x 4.25"Th |
| Item Firmness Description | Adjustable |
| Item Thickness | 4.25 Inches |
| Item Type Name | Camping Mattress |
| Item Weight | 5.5 Pounds |
| Manufacturer | Cascade Designs Inc. |
| Manufacturer Warranty Description | Limited lifetime warranty. |
| Material | Polyester , Polyethylene (PE) |
| Material Type | Polyester, Polyethylene (PE) |
| Mattress Comfort Layer Material | Comfort Foam |
| Model Name | MondoKing 3D, XXL - Marine Blue |
| Model Number | 14021 |
| Number of Items | 1 |
| Number of Layers | 3 |
| Product Care Instructions | Spot Clean |
| Product Dimensions | 80"L x 30"W x 4.25"Th |
| Size | XX-Large - 80 x 30 Inches |
| Special Feature | Anti-Deflate , Inflatable, Portable |
| Specific Uses For Product | Sleeping Pad |
| Target Audience | Adult |
| UPC | 040818140215 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
| Weight Capacity Maximum | 1440 Pounds |

## Product Details

- **Brand:** Therm-a-Rest
- **Color:** Marine Blue
- **Included Components:** Pump Sack
- **Item Weight:** 5.5 Pounds
- **Material:** Polyester, Polyethylene (PE)
- **Product Dimensions:** 80"L x 30"W x 4.25"Th
- **Size:** XX-Large - 80 x 30 Inches
- **Special Feature:** Anti-Deflate, Inflatable, Portable
- **Specific Uses For Product:** Sleeping Pad
- **Target Audience:** Adult

## Images

![Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad - Image 1](https://m.media-amazon.com/images/I/71+BNN310+L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing comfort
*by J***N on March 19, 2026*

This is one amazing air mattress. I have never liked sleeping on air mattresses. This one is a game changer. I am 300lbs and it was so comfortable I slept better on this than on my own bed. Five stars. Highly recommend!!!!

### ⭐⭐⭐⭐⭐ Best camping sleep for the money.
*by R***N on September 6, 2024*

The only thing I dislike about this, is that it didn't exist sooner. 😂 Easily the best camping air mattress I've ever used. It felt like sleeping in my own bed, because of the foam, it's great. I slept well, all night, on the ground, in the woods. No tossing and turning, and I felt rested in the morning. It's not loud or makes weird noises when you move around on it, and it feels soft to the touch instead of plastic or something. It will basically self inflate, but the bag it's stored in can be used as a pump, which is neat, but I bought the tiny pump for it. Inflates in under 10 minutes I think. It's a bit bulky, not for backpacking but if your worried about your back and want to camp, use this mattress, my 75yo dad approves. 👍 It seems well built and can support my fat butt so I recon it will yours too, and be comfy. 🥰

### ⭐⭐⭐⭐⭐ Love
*by C***A on January 19, 2026*

This is one of the most comfortable things I’ve slept on. Makes car camping/camping a breeze. I’ve used on hot nights and cool nights and if anything happens I’ll repurchase. Love my mondo king.

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-04-27*