New answers tagged saddle
One of the "ergonomic" saddles might go some way towards solving the problem. There's a style that just have pads for your buttocks with no "nose". This will reduce the extra wear to just that from your thighs rubbing together. Or you could go the whole hog and buy a recumbent :) This one via ...
Overall riding style probably dictates the type of saddle you should choose. I do think that a cushy, fabric covered gel saddle would be more conducive to wearing out a piece of fabric than a smoother plastic or leather saddle. Another contributor to fabric wear is machine washing. Something to consider. For comparison, I wear Levi 501 shrink to fit ...
The obvious answer would be to get some Cycling Jeans, i.e. jeans specifically designed for cycling in. These have reinforcement and stretch in the right places and often have other features such as deep pockets, a loop to carry a small lock and reflective strips. Levi, Rapha, Muxu and Swrve all make cycling jeans, so there's a fair amount of choice.
A leather saddle may be helpful.
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