Not your average seat pack that allows your tools to rattle around with every bump on the road or trail. Our design compresses to secure your tools and other bike gear. Perfect for keys, wallets and cell phones. The bag is small enough to tuck under your seat with minimalist cargo or expand to haul a rain shell. No matter if, you load a lot or a little in the pack. Strap it down tighten a drawstring and let the heavy Velcro mud flap keep everything secure, clean, and dry.