The search for a great bike daypack ends with the Dakine Seeker 10L Hydration Backpack. Separated compartments and storage pockets provide ample room for a first-aid kit, basic repair tools, raincoat, emergency supplies, snacks, and three liters of water, plus a special soft pocket for sunglasses. The fit is snug, but the mesh backing and breathable shoulder straps prevent overheating. A weatherproof exterior means that a mid-summer downpour won’t soak what you’re packing. $160.