-
For jeans that fit exactly like a casual pair of jeans, the best I've ever come across (during some years running marketing at a hipster moto gear retailer) were the Pando Moto Steels. V expensive but I was tempted just to wear all the time. I doubt they'd ever wear out. In a crash, they wouldn't shred (single-layer Dyneema).
For the same thing at a lower price, Richa Original Slim (or non slim, for a 501 fit). Single layer Cordura, won't hold up as well in an off undoubtedly but fits like normal jeans and lasts x4 longer than normal denim sliding down the road. Quality from Richa can be questionable, rivets go sometimes. Decent after-sales care though.
The Rokker gear probably uses the best fabrics, but you have to put up with some of the most 90s looking branding ever, and they like to splash it over the arse of jeans.
Kevlar-lined jeans will be pretty warm, and will need to go in the bin after a crash. I have the Knox Richmonds as they were cheap as fuck and AA rated. They don't look like normal jeans, but I'd rather wear those than textile or leathers (yes I'm a poser, I don't care).
Another option is buying kevlar leggings to wear under high street jeans. Bowtex, or Merlin. I have Merlin ones, cheaper for full kevlar coverage. Personally I use Revit armour in everything, slimmest design.
I wrote this at my old work when the new rules about PPE came in, don't think it's been updated/altered since I left.
Currently I’m sat in a RST branded pair I got cheap off ebay to suss out, and not sure if I wanna risk riding in them. They only have limited aramid lining, not a full liner. May relegate them to wearing as work jeans not riding jeans.
So far biggest issue has been the lower leg doesn’t fit comfortably inside the road boots (and looks weird as material bunches), and when over the top of the boot is incredibly jeans-n-schuh.
Was hoping for casual, abrasion resistant, external knee armour I can remove when meeting friends to hang out. Suffer incredibly compromising temperature control on short rides for the sake of comfort off the bike.