High-mountain hikes and tough trails have met their match when you wear the highly cushioned Brooks Caldera 4 trail running shoes. Predecessor: Caldera 3. Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Trail. Differential: 4 mm. Please click for more information about Caldera 3 technology. Ariaprene mesh upper provides superior maximum breathability and flexibility. Lace-up closure. Lace-garage for added security. Integrated Gaiter Tab at the heel is compatible with hook-and-loop gaiter systems. Padded tongue and collar. Smooth fabric lining offers a great in-shoe feel. Removable foam insole. Midsole geometry supplies inherent protection and a stable ride that helps as fatigue sets in. BioMogo DNA midsole delivers dynamic cushioning that adapts to each and every stride. Sticky TrailTack rubber outsole features lugs with high surface areas for exceptional uphill and downhill traction. Imported. Measurements: Weight: 1 lb 2.7 oz Product measurements were taken using size 8, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.