The Helmmate is a Danish design meant to keep your bicycle helmet protected and your seat dry. The design is actually quite ingenious, and makes you wonder why it wasn't thought of earlier. The Helmmate attaches to your bike's seat and is essentially a small pouch with a waterproof bag inside of it. Once rolled out, the bag fits over a bicycle helmet and locks it in place and keeps the seat itself dry.
The Helmmate should encourage more cyclists to wear helmets as it gives them a place to store their head protectors when not in use. This design should also make things more comfortable for cyclists who happen to be living in wet parts of the world. It's available now in both Denmark and Sweden.