New-improved,-form-fitting-Extreme-Vented-Sport-Boots.-Features:-Darts-placed-in-key-locations-that-allow-the-Tough-1-boot-to-conform-to-the-leg-providing-support-while-keeping-dirt-and-debris-out.-The-vented-inner-layer-works-in-conjunction-with-the-vented-outer-layer-to-provide-360-of-maximum-protection-and-comfort.-Suspensory-Sling-provides-flexible-support-to-the-fetlock-while-not-restricting-movement-or-inhibiting-performance.