The Alpinestars Protean DryStar Motorbike Trousers are packed with features...Specifications Include:Multi-fabric poly shell construction yields the optimal combination of durability, protection and weightClass leading impact protection provided by removable CE certified knee protectors which are housed within internal mesh pockets, allowing them to be adjusted according to rider\'s leg lengthPre-curved legs and an articulated knee construction provide high level of comfort while stretch panels on crotch and knee provide enhance freedom of movementExcellent protection against the elements provided by the DryStar waterproof and breathable linerRemovable thermal liner ensures high levels of comfort when riding in cooler conditionsInternal hip compartments are lined with ergonomically tapered PE comfort foam for superior riding comfortWaist connection zipper allows attachment to selected Alpinestars leather and textile jacketsIntegrated high visibility reflective detailing enhances rider visibility in poor light conditionsVelcro waist adjusters for a safe, precise fitPremium YKK zippersExtended zippered boot gussets ensure a tight seal around the ankle and facilitate fitting and removalExternal flat storage pocket