I second the Prestige leathers. What I found was bothering me when i put my old leathers on my new saddle was the lump the old style leathers made at the stirrup bar. My old leathers were 3/4" children’s leathers from Beval, single ply. I have always used children’s leathers because I am short and have short legs and would end up having to punch more holes in the adult leathers.
Anyway, I saw the Prestige leathers at a tack shop and asked the sales person about them, and she said the metal thing at the end of the leather, where they attach to the buckle, would make them lay flat. Sorry I don’t know the proper name of the metal part
They do lay very flat on the saddle and don’t bulk up under my thigh. I bought myself a pair on ebay for a song, so I don’t know the retail price (but I seem to remember them being about $100 or $110 at the tack shop, and I didn’t want to spend that on something I didn’t know I would like, hence ebaying).
The other positive I have to say about the Prestige leathers is they have a lot of holes in them. I have 5 holes left above the hole I am using, and they are adult leathers (I am 5’4" and have about a 29" inseam). They are spaced at what I consider to be half-hole intervals, so lots of options, and they will work for a short legged rider.
I’m pretty sure they have nylon lining, but even if they don’t, mine have not stretched at all.
Anyway your actual question was more along the lines of what would slide through the stirrup bar better. A nice side benefit of the Prestige is they slide way better than my old single ply leathers. I don’t know if that is because they are thinner, or because they are slicker, or what, but I don’t have to get off to change stirrup length.
Color: I now have 2 pairs of Prestige leathers because I bought a pair for DD’s saddle. The first pair from ebay was virtually new and is a milk chocolate color (think Hersey kiss). The second pair, also from ebay, had been used more, and is a very dark brown, like they had been oiled a lot (think dark chocolate). My guess is they come the milk chocolate color new, but if my 2 pairs are the norm, you can definitely make them darker pretty easily. I don’t use anything but Leather New on my tack (I don’t like the limp feel that heavily oiled tack has) so the newer pair is still milk chocolate and looks good with my Pessoa XP3.