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