The Nike Zoom TR Essential is a lightweight, breathable training shoe designed for gym-based functional training activities. Mesh upper with adjustable and dynamic midfoot support strap and lateral forefoot support strap adds stability. Low-profile, lightweight injected unitsole. Heel Zoom Air™ unit. Flex grooves provide maximum forefoot flexibility. Non-marking green rubber pods with a gym traction outsole offer flexibility, durability and support where you need it. Wt. 8.5 oz.