These women's On Cloudultra running shoes are perfect for long trail runs and off - road training. To use them, simply adjust the laces using the easy FlipRelease™ system to get the right fit. Remember to buy a half - size up for the best comfort. When you're out running on forest trails or gravel roads, the Missiongrip™ will keep you steady. For maintenance, clean the shoes with a soft brush and mild soap after use. Let them air dry, and avoid putting them in the dryer. With about 5% total recycled content and 20% recycled polyester, these shoes are also eco - friendly. Enjoy your runs in these comfortable and durable shoes!