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aye - quick but of research now -
stolen goat says there water resistance is fabric based not a treatment so doesn't wear out .morvelo is dwr as is pearl izumi .
endure thermolite "Teflon" and its DWR got me through last 2 winters before the knees started to let in water, but I returned this years before winter because of weird sizing it seems now - cutting the stomach on the bike but too long in the leg if I size up - dunno if they changed them for a reason.
hmmm waterproof bibs / over tights - whats good and can stand multiple washes and remain water resistant
Stolen Goat / Morvelo etc etc?