If you are really tight on space on your road trip, and your main goal is to keep your GPS mounts or custom instrumentation under cover, or keep your seat dry from the morning dew for a quick get-a-way in the morning, then this 1/2 cover is ideal. Specially treated, UV protected nylon blocks out 99 percent plus of sun’s harmful UV rays and protects against all natural elements. All seams are electronically heat sealed to be completely 100 percent waterproof and snug elastic bottom allows for snug fit on all shapes. Packed in its own stuff sack when folded, it’s small enough to fit in almost any storage compartment. 1 year "no hassle" warranty.