Waterproof, sturdy transport rucksack with an adjustable flap closure reinforced with Cordura. The Nirvana of waterproof backpacks. Just wearing it makes you feel badass, and you could carry your buddy in it, it's so big. (Not the fat one, but your skinny friend for sure).
Outer compression straps for compact loading, carry handle, shoulder straps, reinforced base, and internal pocket.