Exos Medical Corp. has raised $925,000 in equity to develop its high-tech casts and splints that have been worn by several notable athletes, according to a Securities and Exchange Commission filing.

Casts are for third-graders. Exos Medical’s high-tech braces, splints and casts–which go on sale this month–are adjustable, breathable, lightweight, clean, and waterproof. They also happen to look ...