I have two calf boys that I purchased in the spring, so they aren't very old. One is nude and is only used occasionally. The other is navy and I use it pretty frequently (probably about twice a week) and there are no visible signs of wear or wrinkling...even on the corners or under the flap where you typically see scratching on lamb boys. Calf definitely wears better than my lamb pieces. I recommend it especially for the boy bags since those seem to show wear more easily on the corners and under the flap in lamb. I also have boys in caviar and goat. I hesitate to buy a boy in lamb due to the wear issues, but I have other pieces in lamb that have held up just fine. I think the style of the boy bag, which tends to swing around and has square corners, causes it to wear more easily in lamb than other styles in lamb. HTH!
That helps a lot. Thanks for the good info!