New Balance Numeric Logan 637 asphalt synthetic Levi Brown colour way. Light and durable, the Logan 637 is our high-endurance model. The New Balance 574 inspired upper has no internal or external seams to enhance comfort and durability with a thin flat outsole for maximum boardfeel and control. Reengineered last, outsole, midsole. One piece quarter and vamp construction for durability, Synthetic Leather uppers bonded with TPU provide enhanced durability, Full REVliteŒ«íî midsole for weight saving cushioning. One piece quarter panel and vamp construction for no seam obstruction or blowouts. TPU bonded PU for durability and reduced weight, Internal hidden toe protection for added durability, Laser perforation for breathability, Injection molded EVA insert for consistent fit, superior cushioning and reduced weight, TPU heel counter for stability, REVliteŒ«íî EVA foam midsole provides a 30% weight reduction and makes the _äóæ_Logan_äóæ one weight reduction.