Gym shoes are for the gym. Running shoes are for the street. The Merrell Siren Sport is for women who want to stretch their limits off the beaten track. This women's shoe features a full grain synthetic leather upper that features rubber bumpers at the toe and heel for durability. A Merrell Air Cushion midsole features Q-Form technology to smooth out strides and maintain alignment. The four-way breathable mesh lining is treated with Aegis antimicrobial technology for a healthy foot environment. This Merrell shoe has a heavier lug pattern outsole that delivers vital traction in high-friction areas and under the arch. When the goddess of getting outside calls, the Merrell Siren Sport answers!