Whats the most effective, yet practical, way to keep your feet dry on a rainy bike commute without resorting to awkward, oversized boot covers that can be a hindrance to pedaling efficiency, and are there any innovative materials or designs on the horizon that could potentially revolutionize the way we approach waterproof footwear for cycling? Are there any clever hacks or DIY solutions that can be employed to keep water from seeping into the shoes through the cleat holes or other vulnerabilities, and what are the trade-offs in terms of breathability, weight, and overall performance?