The certified SP-X Pants are constructed from a multi-material chassis of full grain leather & extensive stretch fabric for excellent fit & movement. An extended rear waist, a reinforced seat area, plus internal body-mapped mesh lining, means these pants offer optimized levels of durability, coverage & comfort. Construction Multi-panel, multi-fabric main chassis construction: 1.3 mm high grade bovine leather & highly abrasion resistant stretch fabric Accordion leather stretch zones above the knee & upper back offer enhanced flexibility Internal mesh lining with stretch panel inserts work in conjunction with outer stretch zones for freedom of movement High extended rear waist provides greater overlap coverage with the riding jacket Large stretch panels on calf & crotch area for enhanced fit & feel Pre-curved leg construction helps reduce riding fatigue & improves fit Protection Supplied with Alpinestars’ class-leading certified Nucleon KR-H Hip Protectors, which incorporate advanced PU foam for impact & abrasion resistance & are ergonomically designed Internal certified Alpinestars GP-R protection on knees Protectors are anatomically profiled & feature impact-absorbing EPU foam for fit & comfort Protectors are replaceable Replaceable sport knee sliders for excellent impact & abrasion resistance This garment is certified 89/686/EEC Features Waist circumference adjustment for personalized fit & comfort Waist connection zipper allows attachment to Alpinestars riding jackets Hook & loop grip ankle closure ensures pant remains stable on the lower leg Internally reinforced seat area for comfort, durability & protection