(Used) 3d strap used to improve rotational movement and mobility

Looking to sell my sons 3D strap we got for him last year. He’s barely ever used it and this is his last year of baseball so we are selling it. Used for improving “THE NEW GYM ESSENTIAL THAT HELPS IMPROVE MOBILITY AND STRENGTH FOR ROTATIONAL SPORTS MOVEMENTS.” Really neat tool with tons of usage. https://whatsthatstrap.com/collections/3d-straps/products/3d-strap-new Can be used for hitting or pitching. TONS of different videos and topics that you search for how to use for your specific use case, as well as different attachments for this (sold separately). Sells for 74$ new will take 40$.