adidas Outdoor Boost Urban Hiker CW Primaloft Boot - Men's Collegiate Navy/Black/Night Flash 9 leather-and-synthetic climawarm technology helps keep feet warm and dry. PrimoLoft insulation delivers comfortable warmth in cool climates. Synthetic upper materials. Lace-up closure. Plush tongue and collar. Breathable fabric lining. Molded foam insole. Boost energy-returning properties supplies endless rebound. EVA midsole provides lightweight, daylong cushioning. EVA heel frame adds stability. PRO-MODERATOR medial support controls overpronation. Continental rubber outsole supplies reliable grip in wet conditions.