Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad

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!!!!

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. 🥰

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.

Consider me the princess of the princess and the pea. I’ve 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 didn’t inflate this all the way the first time, and I didn’t 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 it’s thing, then add manually to your firmness preference. It’s also super easy to deflate and it packs smallish. If you are having trouble getting comfortable camping, buy this. It’s a game changer for car camping.

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.

Pretty comfortable air mattress , good quality , easy to carry and store .

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 mattress’s 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 (that’s not a built-in pillow). Use this information as you will.

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.