yeah, i think it's the same. it just covers the top of the helmut and is barely large enough to wrap under the lower "rim" of the helmet so it stays in place. mine's Pearl Izumi and black with thicker material in the middle and then thinner breatheable material on the sides where there is less direct wind/rain -- actually an x-girlfriend bought it for me as a present a few years back, probably would have never tried it otherwise.

actually, i think mine looks OK - not stylish, but OK - makes the helmet look more like the old 80s all-stryofoam helmets (i also got made fun of for my old helmet that i still wore in '97 until i broke it in a crash and bought another)

yellow is probably better for visibility... one disadvantage with mine is it covers the reflectors i put on the helmet (but not the small blinkie on the bottom back of the helmet)

i ride in bad weather more than most others i know, so i pretty much ignore "wussies" who who make fun of me for using fenders or neoprene shoe-covers or reflectors or whatever b/c they're not "tough and cool". if they really want they can ride with me though the winter and prove how tough they really are... but i'll be riding regardless!