The Signal D/MS/X 'Ocean Cube' was released on August 15th, 2019, as a follow-up to the original summer release. Available in three shades of blue, this Nike concept design takes inspiration from the sea, featuring wavy lines and integrated elements that convey a fluid vibe. The shoe showcases a mesh bootie covered by a translucent overlay with oval openings, allowing the side strap eyestays to slide through and secure the laces. Additionally, the dropped collar of the shoe dips low, almost touching an exaggerated molded arch panel. Overall, the Signal D/MS/X 'Ocean Cube' captures the essence of the ocean with its innovative design and thoughtful details.