Aggressively articulated design in the waist & knees conform to the rider while in the ride position X-Stretch 4-way stretch panel in the crotch increases unrestricted riding mobility Knee panel flex-zones increase mobility & improve fit over knee braces & guards Full-grain leather inner knee panels for maximum heat & abrasion resistance Multiple stretch-zones, including a hidden rear flex panel & Lycra insert liner gusset ensure mobility & a contoured fit