Under Armour Charge RC2 Running Shoes synthetic-and-mesh ** UPDATED ** Articulated Upper Flex - To mimic and enhance natural foot movement and allows the foot flex for more natural. ** UPDATED ** Super Lightweight - 2 ounces lighter than its predecessor, giving you one of the lighterst feel ever and making your workout easier. ** UPDATED ** Thinner Midsole - To allow allows greater stability due to its lower to ground profile. ** UPDATED ** Padded MPZ Tongue - A great modular protection zone desgined to help protect the upper of your foot from abrasion. ** NEW ** Innovative Midsole - Uses geometry to keep your foot in constant contact with the ground, so you are made to work with your gait not against it.