

š¶ Elevate your outdoor sleep game ā because roughing it shouldnāt mean roughing up your rest.
The Therm-a-Rest MondoKing 3D is a premium self-inflating camping sleeping pad featuring a 4.25-inch thick, 3D vertical sidewall design for maximum comfort and usable surface area. Its 7.0 R-value StrataCore construction provides superior insulation for extreme conditions, while the TwinLock valve system enables fast, hassle-free inflation and deflation. Lightweight and compressible to a compact size with an included pump sack, itās designed for serious campers seeking luxury and durability backed by a limited lifetime warranty.







| ASIN | B0CQRVLKHB |
| Additional Features | Anti-Deflate, Insulated, Portable |
| Best Sellers Rank | #52,027 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #66 in Camping Air Mattresses |
| Brand Name | Therm-a-Rest |
| Capacity | 1440 Pounds |
| Color | Marine Blue |
| Customer Reviews | 4.2 out of 5 stars 858 Reviews |
| Global Trade Identification Number | 00040818140208 |
| Included Components | Pump Sack |
| Item Dimensions L x W x Thickness | 77"L x 25"W x 4.25"Th |
| Item Firmness Description | Adjustable |
| Item Height | 4.25 inches |
| Item Thickness | 4.25 Inches |
| Item Type Name | Camping Mattress |
| Item Weight | 4.38 Pounds |
| Manufacturer | Cascade Designs Inc. |
| Manufacturer Warranty Description | Limited lifetime warranty. |
| Material Type | Polyester, Polyethylene (PE) |
| Model Name | MondoKing 3D, L - Marine Blue |
| Number of Items | 1 |
| Product Care Instructions | Spot Clean |
| Size | Large - 77 x 25 Inches |
| Specific Uses For Product | Sleeping Pad |
| Target Audience | Adult |
| UPC | 040818140208 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
| Weight Capacity Maximum | 1440 Pounds |
S**H
Good
Pros- Great for camping. Self inflates with bag of air (please watch a video on how to fill up quickly). Can adjust how much air for firmness, pretty comfy, good quality, good length. Con- toddlers think itās a trampoline, hard to sleep next to someone as they are meant for one person, even with a second next to them. Does slide a bit on the bottom of a tent.
E**M
Excellent sleeping comfort
Great product and fast shipping
T**O
Comfy
I have slept multiple nights on it with zero issues. It is big, but man is it comfy. Definitely not a backpacking pad, but if you have the room in your car, you can't go wrong. I would even use this at home as a spare bed in a pinch.
R**N
Best camping sleep for the money.
The only thing I dislike about this, is that it didn't exist sooner. š 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. š It seems well built and can support my fat butt so I recon it will yours too, and be comfy. š„°
M**N
Cloth is too weak to hold air overnight
Thin, weak nylon cloth covers all sides of the mattress. Very thin and very weak. Mine got a small tear in the cloth the first time I slept on it. I patched the tiny hole, but it got several more holes the next time I used it. The cover cloth is so weak that if you put your knee on the inflated mattress, it can be damaged. I now have more than 10 patches on holes I've found, but I've never been able to keep the MondoKing inflated overnight. It's just not made of sufficient material.
K**N
Most comfortable
Consider me the princess of the princess and the pea. Iāve tried everything. I had settled on bringing an air mattress when camping. But I was frustrated by 2 things: the cold and having to inflate it multiple times. Never mind how big it is and the fact that I needed a separate tool to inflate them. I have tried many sleep pads from Amazon and with each one, I woke up multiple times during the night with soreness. I didnāt inflate this all the way the first time, and I didnāt know what all the fuss was. I added more air and WOW! It not only helps to keep your body heat from being sucked out, but the comfort is unreal. I never felt the ground and my joints felt supported. It is easy to inflate, let it do itās thing, then add manually to your firmness preference. Itās also super easy to deflate and it packs smallish. If you are having trouble getting comfortable camping, buy this. Itās a game changer for car camping.
M**K
Good while it lasted.
Purchased in May 2021, so lasted 4.5 years of moderate use. While sleeping on it last week Dec 2025), I heard a pop, followed by more and more pops throughout the night. The seams that keep the mattressās integrity while full started to release. This allowed for uneven air distribution, rendering the mattress unusable. I paid $299 in 2021. It was good while it lasted however. Photo attached (thatās not a built-in pillow). Use this information as you will.
S**E
Comfortable night of sleep!
I ordered this item for a camping trip. Even though the reviews were primarily positive, I was skeptical buying an inflatable mattress, as I struggle with lingering back pain. I was shocked at how comfortably I slept on this mattress. The price was worth the pain-free mornings! I definitely recommend this product.
Trustpilot
2 days ago
4 days ago