When Klim built the industry-first Adrenaline GTX® Boot, it set the standard for technical snowmobile footwear. For the Adrenaline’s 3rd generation, perfecting and improving upon a near-perfect formula was Klim’s goal. Adrenaline provides a dry, comfortable, and supportive riding experience across a wide range of conditions without impeding freedom of movement.GORE-TEX® technology600 grams of 3M™ Thinsulate™ insulationInsulation inside GORE-TEX® membrane ensuring a dry thermal layerExtremely durable/aggressive soleMoisture-wicking liner plush liner materialsSpeed lace systemComfortable yet stiff/durable soleInternal cushioningLower D-ring position to hold cuff downRemovable moisture-wicking Ortholite® insoleAnkle cutout promotes forward flexUse of a technical sock is required to ensure GORE-TEX® footwear top performanceHalf size fit created with included insole insertGuaranteed to keep you dry