Hello everyone - I've recently been made aware of some new fabrics that actually keep you cool. I'm planning to walk in the summer and easily get heat stroke (no judgement please - I really do love the summer). I'm not talking about fabrics that just wick away sweat and moisture - fabric that keeps you cool. I'm thinking of T-shirts/long sleeve T-shirts. Has anyone got any recommendations or suggested brands to consider? I hate buying new 'stuff,' but if this can keep me cool when the temps soar above 30C, then I'm all in.