holes dont let much air in … theyll let the smelly armpits perspire
the key to windshirt is breathability … as long as it stops the wind decently and has some DWR … thats all you need … a bit of minor permeability actually helps in increasing breathability ….
if yr in gale force winds anyways … youll have yr hardshell … and likely be in a tent
if it aint breathable, youll be sweating

