The support frame is made from two pieces of 1/2" electrical conduit coupled together, so it's modular for summer storage. The frame sits in the bucket on top of the seats. The cover is primarily Sunbrella fabric, a light awning material, with zippered vinyl windows. The nylon strap, sewn into the bottom of the cover and fastened under the lip of the bucket, keeps the whole thing in place.
Conception and production was a group effort. Many thanks to my dad for helping with the pipe bending, and many many thanks to my wife for showing off hew prowess with a sewing machine. Hat tip to Crow for sending us to Seattle Fabrics - they had everything but the conduit!
Unless the weather is too nice, we'll have a full review soon. What do you think?