How to use: Simply put on the shoes and use the FlipRelease™ system to adjust the fit easily. You're all set to go for your long trail runs or off - road training. Note: It's a good idea to buy a half - size up as recommended. When you're out running on different terrains, the Missiongrip™ will keep you stable, but be careful on extremely slippery surfaces. Maintenance: After use, clean the shoes with a soft brush and mild soap to remove dirt. Let them air - dry naturally. Avoid putting them in the dryer as it might damage the materials.