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This came up my Instagram feed yesterday.
Entertained by the casual swapping of strain and stain but heck, their English is better than my Chinese.
Health Benefits: Saddle stains are brutally painful annoying and unhealthy! Every rider experiences them while doing his favorite activity and that's why the CARBONFIT™ Saddle was created! Our saddle unlike others remove OVER 97% of saddle stains providing you with the best riding experience that you will ever have!
There is a video that looks pretty good at flexing but I keep expecting something to snap.
Yeah, I've seen those before. Bloody light but in not sure my butt would get on with them however much flex they have. You'd get a cool mud effect on your arse though.lol
I think there are some user reviews on yt?