The De Soto Helmet Beanie works really well. Cycling in hot climates like southern Florida requires keeping the sweat out of your eyes and keeping cool. This works well. One thing - there is a lot of excess cloth at the top for me. It doesn't affect the overall experience, but does make for less than a snug fit.
This is has a comfortable fit and does a great job with keeping your head cool on those hot, summer days. Also, like that this is moisture wicking and keeps sweat from dripping down your head.
I haven't been able to test this in searing heat just yet but it feels good, not too tight and it stays in place. I've recently come to appreciate having a helmet liner in warmer weather, this one does not disappoint.