I actually got these and really like them: https://www.amazon.com/...cr_ryp_prd_ttl_sol_0
There are other brands that have the same central system and charge much more. I got the XL boots so that all of my quads were covered and they are awesome. I am 6' and my wife is 5'2" and we both use the XL. Great option. I also tried the Air Relax, but didn't like them as much, quality of the boots were less, powercord was pretty short - but it did have a remote.