Mathematixwrote a review of Patagonia Black Hole 35L Daypack - 2136cu in on June 25, 2015
Familiarity: I've put it through the wringer
This thing has the look of heavy duty water resistance, but in reality the rain will drip off for awhile, but after 15-20 minutes things inside start to see some moisture. The pocket on the top flap is where I'd put my wallet/phone/keys when hiking, but that seems to be the least water resistant spot. I ended up using it more as a travel bag for flying, but without side pockets for beverages that got annoying too. It's definitely built solid & can take some abuse, I just feel like there's some fundamental design flaws here for what it is.