I have one. It's good. Tough I don't sweat crazy in helmets I do with this. So if you get one, I recommend a skull cap like this to go under itAnyone used a bump cap insert in a regular cap?
https://www.ebay.co.uk/itm/184642644889
Looks useful to me, but potentially uncomfortable.
https://www.amazon.co.uk/dp/B08C9R1DLN/ref=cm_sw_r_apan_glc_i_YG4W1MMX18BVE8DY6S96?_encoding=UTF8&psc=1