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Made a very high tech saddle sun cover
(sopuli.xyz)
My bike is exposed to the sun on the balcony where I keep it. This is probably not so great for the leather saddle, so I improvised a sun cover from some wire and folio. This highly advanced design doesn't trap heat underneath.
It's supposed to mold to your butt's shape, while still being a hard surface (which tends to avoid soft tissue bruises). I think it's only relevant for bikes you ride for days. My city bike has this ancient plastic saddle with springs, and it does the job just fine.
Ahh, thank you!