Named for the fastest bird on earth, the agile Peregrine ICE 3 more than lives up to its name. NEW PWRTRAC ICE outsole gives you a strong grip on icy surfaces. Rock plate protects from rough terrain underfoot. Softer PWRRUN foam formula cushions with less weight. Water-resistant RUNSHIELD upper keeps you dry and comfortable. FORMFIT design hugs your foot for a personalized feel. PWRRUN sockliner gives you an extra layer of cushioning. Trail outsole lug height - 3.5mm. Gaiter compatible - Yes. Sustainability - This style is vegan and contains recycled materials.