www.zappos.com Product Description: # For a super cushioned, yet supportive ride, lace up the K-Swiss® Super Tubes® Run 50 and take them on a test run. You’ll be miles down the road before you remember to turn back. # Air mesh upper allows for maximum breathability. #Synthetic leather overlays supply durable, targeted support. # Reflective elements for visibility in low light. # Lightly padded tongue and heel for added comfort. # Molded EVA insole offers lightweight, plush support. Can be removed to accommodate an orthotic. # K-EVA is an enhanced EVA, especially designed for optimal cushioning and long-lasting durability. # Tubes™ technology provides supreme cushioning. # Cylinders of various sizes are strategically placed in the heel to maximize stability and shock absorption. # AÖSTA II, a high-density rubber outsole delivers exceptional durability. # Flex grooves are anatomically placed for enhanced flexibility and stride efficiency. # Weight : 14 oz # Product measurements were taken using size 11. Please note that measurements may vary by size. # Enhance your runs with these running accessories: