New Zamst RK-1 Runners Left Knee Brace, Black Large IT Band Syndrome has small slit on back. * The "Trainer" model features A167109 Lrg Wht/Blk 30/19:Red/Black Granite MaxBat does not compromise

New Zamst RK 1 Runners Left Knee Brace, Black Large IT Band Syndrome has small slit on back. * The "Trainer" model features A167109 Lrg Wht Blk 30 19:Red Black Granite MaxBat does not compromise * The "Trainer" model features the Neoprene padding system combined with the patented performance hinge which provides maximum "Ankle Flexibility" * Solid U Shaped design promotes "Early Activity After Injury" and relieves pressure from the ankle joint * Dual strap fastening system allows for a more "snug" fit * Assists with chronic ankle instability or has preventative use in rehabilitation It is a 11 with a 2 1 4" barrel diameter