Tom wrote a review of Black Diamond Tripod Bivy Bag on September 26, 2012
Familiarity: I've used it several times
Kept me dry in 5 days of rainy afternoons through Mono Pass near Rock Creek CA. I trust this bivy! Durable, breathable, just dry it out before you pack it up. Use a large trash bag to keep your backpack dry in the rain. I am 6 ft tall and this is the perfect size.