The more expensive model is a mesh material. Honestly....I have the pro mesh HSS and I love it. But if it's supposed to be cooler by it being mesh....don't spend the extra $$. It's still too warm to wear it during the early NC season (easy....I DO wear one....just not a vest type when it's hot).

Advice, though.....I paid $90 for my pro mesh on sale after the season a couple years ago. If you have a harness you can use this year, I'd maybe wait and try to catch one on sale.