I bought a l/h one years ago and have now bought the right hand one ! its definitely worth the extra few pounds for the adjustable one ( like this one ) I had a non-adjustable one and sent it back as you cant adjust the compression with that type , I Had to buy the small one as they run a tiny bit big Buy with confidence you wont regret it !!!
It's probably a bit to "server" a knee support for what I need ( I broke my leg when I was 17 on a motorbike and now at 56 I'm paying for it ) But I take it with me when I go hiking in case I need something "heavy duty" to make it home.