CastleFlexx is the first mobility device that combines full body stretching with a built in mobility bar for strengthening exercises. Choose the standard size if you are under 6ft tall. Made from 100% eco materials, each stretch sleeve is made from 27 recycled plastic bottles. The bar is used to create a stress free grip allowing your neck and back to always be in resting position while using the device for lower body stretches. The patented design allows the toes to achieve dorsiflexion and there is no rope or strap to try and grip for long periods of time so people ages 50+ appreciate this device a LOT.