Made from Sustainable Materials Upper is made with around 60% repurposed materials, including plastic bottles diverted from landfills Product Features Neutral road running design engineered for supreme softness and ultimate comfort Streamlined warp knit upper offers enhanced breathability, extra flexibility and an improved fit Brooks branding on the lateral, medial, midsole and tongue for a stamp of performance running approval Nitrogen-infused DNA LOFT v3 cushioning maximizes softness for extra cushy comfort Broader platform stabilizes the foot and promotes smoother heel-to-toe transitions Durable rubber outsole built to deliver grip across surfaces and last through your rigorous running routine The Brooks Glycerin 21 Running Shoes are imported. Fuel your running regimen with the Men's Brooks Glycerin 21 Running Shoes and burn up the miles in unparalleled comfort. An updated warp knit upper allows your feet to breathe while increasing your range of motion, and an added 2mm of nitrogen-infused DNA Loft V3 technology, compared to the Glycerin 21, provides sensationally soft cushioning that'll have you comfortably coasting run after run.