Every time we put on a backpack and hop on the bike we’re terrified that water is going to fall from the heavens and ruin everything inside. Seeing as how it’s impossible to disconnect these days, that collection of stuff normally includes at least an iPad or a laptop. Timbuk2 to the rescue with the Especial Tres Backpack. The laptop pocket on this rolltop beauty is so obsessively waterproofed (it’s welded!) that it’s guaranteed. That’s definitely important, but what else does it do? It expands enough to accommodate a six pack or a full case of beer. The back panel is ventilated to eliminate the dreaded lower back shirt stain. There are also pockets for everything from keys to U-locks, chest and waist straps, reflective pieces and the main compartment roll top. The only thing this bag doesn’t do is pack itself.