Frogg Toggs are heavier and more expensive than DriDucks, but are more durable. Both are far more breathable than any other rain gear I have rbrt tried. They are definitely not a vapor barrier; goretex and its imitators are definitely less breathable than either Frogg Toggs or DriDucks. (No experience with eVent here.) If you want ta vapor barrier, you'll have to get (or make) non-breathable rain gear out of silnylon.