They stretch to let you move, they're adjustable for the perfect fit, and reinforced hems keep them stronger for longer.Ared V02 20000 polyester 4-way stretch fabric with DWR finishTaped seamsHigh loft polyester insulationWarm touch lining to upper legsAdjustable detachable braces with front slider systemElasticated waist adjusters2x side zipped pocketsWarm scrim pocket liningArticulated knee designReinforced binding at hemTab up hemGrow cuffs at hemIntegral snow gaitersReflective detailing