Spigen A721 Dynamic Shield ML Running Vest med 500 ml Soft Flask - sortDescription The Spigen A721 Dynamic Shield is a lightweight 5L running vest designed for active users who value comfort and organization during training. This lightweight vest doesn't weigh you down, allowing you to fully focus on your activity. A zonal ventilation system tailored to each part of the vest ensures optimal airflow: the honeycomb mesh on the back reduces the contact area with the skin and limits heat build up, the mesh on the chest