Design: New, engineered warp knit upper is breathable and allows for a flexible, accommodating fit while staying soft against your foot The broad platform stabilizes your foot and promotes smooth heel-to-toe transitions Made with recycled materials equivalent to 5 plastic water bottles In-Shoe Comfort: Additional 2mm of DNA LOFT v3 midsole for a plush ride Super-soft, nitrogen-infused DNA LOFT v3 cushioning is optimized to be lightweight, responsive, and durable for plush comfort Durability & Traction: New RoadTack rubber includes recycled silica and is lightweight and durable Additional Details: Weight: 8.8 oz Midsole Drop: 10mm Brooks Women's Glycerin 21 Running Shoes