Flex Train Training ShoesNike Flex Train Womens Training Shoes Sail Chalk Pencil Point White Lift. Sprint. Move. The Nike Flex Train Womens Workout Shoes are built to support every phase of your training routine. Designed with lightweight materials and enhanced flexibility, they give you the freedom to move naturallywhether youre powering through strength sets, tackling cardio circuits or heading into high intensity intervals. Engineered for very high flexibility, the rubber