I have the bern without the molded visor or more vents, so the visor snaps in or the winter package snaps in. The winter package is too warm for me until sub 30F, but it is nice to be able to snap the inserts in and out. 4 snaps and some velcro. I have only had the helmet since October so I cant say how well it will ventilate in the summer, but I think it is going to be hot. If I had to do it all over again, I probably would have bought a quick adjust helmet and used my assortment of baclava for the winter. Mine was an REI closeout with the winter package and was still about 50, and had to order the visor directly from Bern for another 10 bucks or so.

I think it is a trend in the right direction, but would like to see a execution of a 4 season helmet with washable liners.

just my $0.02