Very slim knee brace, with my riding pants on I still have slack in the knee area, and I don't wear a next size up pant to compensate for the braces. Not restrictive at all, they track your leg geometry so well that when your sitting on your seat the upper leg part of the brace still sits flush with your leg, not sticking out your pants in your lap like a lot of other braces. They don't slip at all and are surprisingly grippy with the "shark skin" liner they use, its like a rubber and sticks to your skin or sleeve pretty well. I bought these because the Asterisks seems to have the best design theory as far as safety with the adjustable oversized cuffs and boot tether. The whole shape of the design looks like it was designed with purpose rather than something asymmetrical and simple like everything else priced over $400. Cant say anything bad about them that they would truly need improving, they just do the job and allow full movement for riding. And if youre worried about coverage protection in the patella area, don't forget you can upgrade to the ultra cell patella piece too.