If you're determined to hit the trails regardless of the storm clouds overhead then the Patagonia Dirt Roamer Storm Pants may be an essential bit of gear for the ride. Lightweight and packable the Dirt Roamer can be stowed without taking up the entire main compartment of your 14-liter day pack and then pedaled through the rain with a fully waterproof exterior. But the Dirt Roamer is much more than an emergency barrier as the nylon ripstop pairs with a stretch weave for range of motion on the bike so that you can shred the trails and not your pants. Patagonia adds a bit more durability at high-use areas like the knees seat and crotch to reduce wear and tear. And a comfy knit backer on the inside acts like a sweat barrier and reduces the clamminess that builds up when cycling hard in typical rain pants.