I live in Palm Springs Ca, my sling is my daily driver some days its has hit 121on my ride home twice this week and from late May until mid Sept it will be well over 100 every day.
I actually have 5 tops. they are nice white long sleeve moisture wicking tops and they keep me pretty comfortable - my wife and I have talked about a top for the sling, but she wants nothing to do with it - thinks it goes against every reason we bought the sling in the first place - - and when you get right down to it I think she is right - as to the helmet see my post above the little 1/2 helmet I have is about as close to no helmet as you can get in a DOT helmet
I think it is important to note it doesn't have to be an either/or situation.
Depending on the weather/forecast my Stinger roof is either being used for shade/rain, carried on the back in case of extreme weather or sitting in the shed.
I initially bought my roof for shade. Didn't really like the idea of a roof but didn't like the sun beating down on me in an enclosed vehicle ( I know some of you don't think it's enclosed, but to me sitting in the hot sun it sure felt enclosed to me), and no air conditioning. Unlike a motorcycle where you catch the wind, there's no catching even a breeze in the SS, just roasting.
There was only one roof that I thought looked good on the SS and allowed me to remove and install it easily and also carry it with me. Thereby also giving my SS three different looks, the Roadster, the Coupe and when I am carrying it with me, the Beetle look. i.e. the top looks like beetle wings when carrying it on the back. Never thought that I would consider a roof as one of my top three mods, but I do.