I'm shopping for some men's button up shirts specifically for my adventures. I like the idea of plaid because it breaks up the obvious dirt and filth you're covered in. But a good majority of the shirts I find under $40-50 have some % of cotton. Is all cotton a NO GO for you? And on the topic of button up shirts, do you guys find the ability to open them and vent them more helps in summer or does it just not matter? If anyone has a brand that you like I'm open to suggestions within a $50 budget. Thanks in advance peeps!