Merrell Avalaunch Tough Mudder Women's Trail Running Shoes Tough just got easier in this race-day shoe. A speed-lacing system and an ultra-grippy outsole will give you traction in mud while the fit and protection stand up from start to finish. Fabric and Mesh Upper The Merrell Avalaunch Trail Running Shoe is constructed with a fabric and mesh upper which offers ventilation to keep the feet feeling cool and dry throughout a run. Designed with a traditional lace closure, it ensures a quick and easy lace up. Additionally, a bellow tongue will help keep the debris out while out on the trail and a padded lycra collar will provide maximum comfort to the wearer, reducing the risk of chafing and discomfort. UniFly Midsole Equipped with Merrell's M-Select FRESH which naturally eliminates sweat and it's odour-causing bacteria with reactive, friendly microbes that break down perspiration on contact with natural enzymes. For added comfort, an integrated EVA footbed is located in the midsole, while a neoprene lining offers padded comfort in the heel only. Fitted in the midsole is Merrell's UniFly impact absorption system which is made of an ultra-resilient, soft foam with strategically placed firmer shock pads. Providing a soft landing, UniFly disperses impact and allows for a stable takeoff - the perfect balance of feel and protection so you can go further, faster, and longer. M-Select GRIP Outsole Keep your feet well-protected thanks to the Trail Protect pad which will fight off any rogue rocks that you may encounter while on your trail runs. The Avalaunch Trail outsole is designed with M-Select GRIP which is specifically tuned to match your activities as the outsole will root themselves in performance designs and materials to deliver durable, highly slip-resistant traction on wet and dry ground, and over mixed terrain, while releasing dirt and debris with its specialised lugs.