I've got a friend who's pretty handy with a sewing machine and she has offered to do me some leather motorcycle gear for 1/2 the cost of materials as she is looking at expanding her business in that direction in the future. Now at the moment I'm going to get her to make me up a sort of double breasted waistcoat thing with sheepskin lining (I'm VERY prone to the old cold kidneys) and probably some sort of jacket in a fairly non-conventional (for a bike) style and it's the jacket I need some information on. Firstly, apart from the grade of the leather, armour and heavy duty stitching, zips, buckles, press studs etc. can someone point me at any other differences in the construction over your standard leather jackets. Secondly, in the event of sliding down the road how much grip does leather actually have? For example I presume a row of press studs aren't going to hold in a lot of cases and it would be the zip that kept the jacket closed? Also if a section of the jacket came loose (imagine a double breasted front with a zip as the inside fastener as an extreme case) would the road grab it and tear the jacket open or would it more tend to just chew up the leather? Finally, would ~3/5 length coat (coming to around two or three inches above the knees when standing) cause problems? I'm imagining it would catch a bit of mud/water/grime/wind but as far as I can see it wouldn't interfere with anything moving (because getting a coat in a chain wouldn't be fun). My real question I guess would be whether it would catch the coat and pull it up your back in a stack (also not fun I'd imagine). Obviously the last few questions are a bit hypothetical but I'm trying to determine if the design I've got in my head is practical and whether the whole exercise when it comes to the jacket is practical for that matter. :?