Under Armour Micro G Speed Swift 2 Running Shoes Speed off in these Under Armour Micro G Speed Swift 2 Running Shoes which offer great ventilation thanks to the mesh upper and excellent cushioning and rebound properties due to the Micro G midsole. Mesh Upper The upper of the Under Armour Micro G Speed Swift 2 Running Shoes are constructed with a lightweight, breathable mesh which delivers enhanced ventilation, ensuring a cool and dry environment for your feet. Located on top of the mesh is a bonded film at the midfoot which increases durability, keeping your shoes lasting for longer. Lastly, for a comfortable run, the Speed Swift 2 has an EVA sockliner for added underfoot cushioning for a plush feel. Micro G Midsole Fitted with Mirco G which is Under Armour's proprietary foam technology that gives your favourite Under Armour shoes that responsive, bouncy feel. By allowing the foot to be lower to the ground, it provides the athlete with a better feel for what's underfoot, and it enhances the ability to change direction quickly. It's also designed as a high rebound, low compression set foam which provides a higher level of bounce and responsiveness, which gives you a little extra lift and energy return. Solid Rubber Outsole Designed with a solid rubber outsole which covers the high impact zones for greater durability while ensuring less weight. The rubber is mainly located on the forefoot and heel of the shoe as this is where the sole is going to break down first and needs more durability and protection.