Why are your feet wet?
Do you have a direct spray from the front wheel onto your feet? (you need bigger fender and mudguard).
Does the water leak from above into the overshoes? (wear your pants outside the overshoes)
Do the overshoes wet through? (try better type or silicon spray those you have).
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My advice is free of charge and of respective quality.
1982 Miyata 912
1998 Wheeler 5900 with front and rear air cushion suspension
2015 Canyon Spectral 7.0 EX