The design allows for two inches of movement between the breasts, resulting in ideal alignment of the bottles for each body shape. (amazon.co.uk)
When the body is in ideal alignment and your mind is focused on keeping on that way, running becomes more efficient and effortless and a lot easier to enjoy. (saragottfriedmd.com)
These props are an excellent way to help practitioner achieve ideal alignment even if the body isn't quite open enough yet. (thebodhiyoga.com)