The Alpinestars Techstar Phantom Pants are class-leading off-road trousers with many technical upgrades suggested by Alpinestars' sponsored professional riders. An advanced stretch rip-stop fabric construction is highly durable, while the interior is liner-less with flat seams to keep these lightweight and highly comfortable, which gives added ease when putting knee braces or guards on and off. The seating area offers a durable poly fabric for added durability, along with a 3D Babel knee compatible with Alpinestars knee braces with hidden stretch expansion gussets for a custom fit and freedom of movement. Stretch at the leg cuffs, as well as four-way stretch panels, provide added movement and comfort. A double overlap waist with a Velcro closure system is adjustable for the perfect fit and comfort. The silicone print on the inner waist keeps the pants in position. The slimmer fit is compatible with all Alpinestars knee braces and features a unique and proven open-venting design. Plus, the linerless design and flat seam interior offer superior rider comfort.