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Not really - I thought it's supposed to wear like that for core line.
I did contact them about the more expensive ones going apart after a couple of months and got offered either a replacement or 40% voucher of what i've paid for them.
I chose the latter but in general I think i'm done with Rapha bibs. Maybe it was because of the fabric - it seems to be a very interesting fabric on cargo bibs - not something like usual lycra, something more durable, maybe that's why the seams wouldn't last long.
It says on their website that core cargo shorts contain 82% Polyester & 18% Elastane while premium cargo shorts contain 71% nylon & 29% elastane.
Did you try contacting them about the transparent bibs?