Foam mats are much lighter (mine's less than a third the weight of my inflatable). They're also warmer than the lowest R value inflatable. They'll never leak and you can cut them to the right length for you. I've also cut off tiny little rectangles to use on blisters, etc. They're also often much much cheaper, under $20 for the most basic version. They also can be rolled out within seconds and can be handy to sit on mid day if you want a bit of a rest.
Downsides are that they're not very comfortable (though you can make the valid argument that they were used exclusively for decades before inflatables became a worthwhile option) and that they're "obvious". And by that I mean that you pretty much have to strap them to the outside of your backpack and it screams "look at me I'm going to be camping out". For me that's an issue but probably not for most, something to consider though.
Inflatables are much heavier and much (!) more expensive. They're a lot comfier, can be significantly warmer, and you can hide them in your backpack.
I personally like my inflatable ([this one](https://www.naturehike.com/products/tuye-3-5-ultralight-inflatable-pad) ) and use it almost all the time but both are valid options.
I'm exactly the same height and almost the same weight as you and i'm also a side sleeper. I use Naturehike air mattresses. In Germany. I am happy with the price, quality and weight. The specifications according to Amazon: My 3.5R mummy one is 440g, my 5.8R rectangular one is 570g.
Even during summer, nighttime temps can get low enough that a 1.5R mat on it's own can get uncomfortable. Depending on if you are planning on camping high up and how selective you are being about weather of course.
If you're planning on hitting mostly warmer summer days or not really camping on peaks though, the decathlon mat could work.
Some folk on this forum swear by their bestway mats but I've actually had a couple fail and reliability reports online seem mixed. They are good and cheap when they work though.
For my budget mat, I personally ended up with the naturehike 3.5R, ordered from Amazon. For me, it's held air well, is about the price of the other two mats, comfortable enough and I've used it down to just above freezing temps on top of a 1.5R CCF mat, or on its own at 7c no problem.
Get one from Nature Hike. We use **[Nature Hike Ultra Light Sleeping Pad](https://s.shopee.ph/8Kh5Xzq2oF)** para hindi ganoon ka hassle and kabigat dalhin. Even sa tents namin we always opt to choose UL. Portable rin ng storage niya maliit lang talaga. But, still your choice. Okay din if yung automatic na bilhin mo para hindi na kayo mahirapan mag inflate. My friend have it, yung **[Nature Hike Automatic Inflatable Pad](https://s.shopee.ph/4ArWaUxfp3)**. Mas thicker siya and mas may cushioned of course, compared sa UL.
These were decent a few years ago before the Chinese OEMs upped their inflatable game. Kilos/Trekology/Naturehike/etc are a better value
That being said, Klymit does list ASTM R-Values now unlike some other budget pad producers which still use their made up ratings
Intersting fact, Klymit also makes the Cabelas/Basspro branded inflatable pads
Aeon_Return
