Coffee Shop Caps keep dirt and mud out of your Zero cleats when you're off the bike, and give you traction when walking on uncarpeted surfaces. Made of high-traction molded polymer. Drastically improves cleat life and fits right in your jersey pocket.
Product works great as advertised. Would give 5 stars for design and fit alone, but it remains to be seen how they wear in use.
Pros: Easy on and off. Can prevent a fall.
Cons: None yet.