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Your cart is empty.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. 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.
H
Reviewed in Canada on March 3, 2025
Zero stars if I could. Was excellent at first, very comfortable, although not self-inflating. However, after less than one season of light car camping, pad was losing all air overnight, and I was waking up on the hard ground. Also, the pump sack is useless as it was torn at the seam almost out of the box as well.Contacted customer service at the end of the summer 2024 (Cascade Designs), only option was to ship out a new valve, buy my own patch kit, or send to them for repairs out of province. (would be a shipping cost of over $150 for me, plus any repair costs they deem necessary).Out of frustration, put pad away for the winter. Decided to contact them again this year asking for a valve replacement (on January 18), did not hear back at all for the last month and half. Sent a follow up today and received a message they've now switched to an online system. Had to entirely resubmit my request. Hope I will actually hear back from customer service this time.This pad was barely used. 100% NOT worth the cost for the abysmal quality and customer service. You MAY be lucky and not receive a lemon like I did, but don't count on it. I think this issue is common and I would explore other options if you can. AVOID.
Wario
Reviewed in Canada on February 3, 2025
Fantastic sleeping pad! Had an issue with the valve and amazon helped to replace it.
Raijiin
Reviewed in the United States 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. 🥰
Blake Faulds
Reviewed in Canada on September 13, 2024
What a Cadillac. This thing is so ridiculously comfortable. Would recommend 10/10.
Dale Brown
Reviewed in Canada on August 7, 2024
Easy self inflate or use the bag to inflate or use the proprietary pump or your breath. No issues. Good heat retention. Heavy construction, my dog is all over it and not a rend or tear. Value for money because this will last forever.
Jeannot
Reviewed in France on August 27, 2024
J'ai acheté le produit pour camper 10 jours, le matelas se dégonfle seul au bout du 5 jours d'utilisation, pour ce prix prenez un sous matelas et un matelas Decathlon, 260€ pour dormir par terre après 5 utilisation .... Encore merci
DigitalWeiner
Reviewed in Canada on October 28, 2024
Works great!
Alienkiller
Reviewed in Japan on March 2, 2023
自動空気入りの仕組みがあるのため、使いやすい。また、マットレスが厚いので、心地がすごく良い。XXL ver.を選らんたので、以前使った他のものに比べで、断然贅沢気分。
amazonian
Reviewed in Canada on December 16, 2023
Definitely not self inflating and deflates quite often. But sure does feel better while laying on them.
Kunde
Reviewed in Germany on November 9, 2023
Die Matte ist ein Superlative. Man liegt wie auf einer Matratze, super komfortabel und bequem, dazu warm. Die Matte ist super leicht. Der Preis ist gerechtfertigt.
Ken
Reviewed in Canada on August 29, 2022
Size is good. You don't feel like you are falling off of it. Great insulation from cold.
Steve L
Reviewed in the United Kingdom on June 5, 2021
The Therm-a-rest MondoKing XL is well worth the extra cost compared to other SIM’s, we slept 5 nights on the bed and they’ve not required any additional air since setting up the tent. 2 x XL SIM butted together with a king size base sheet provided excellent nights sleep and I am 6’5”.Please remember to read the instructions and allow the mats to self inflate for an hour or so before use and then add a little top up of air.
Jeff Hemming
Reviewed in Canada on October 5, 2020
Best sleep I've ever had while camping! So, good I will camp instead of going to motel and suffering with lump beds! Used for cool weather,
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