Therafirm originated in the early 1950’s when Parke-Davis, a leading pharmaceutical manufacturer, developed and introduced one of the very first gradient compression stockings.

In 1990, Therafirm was purchased by a long time employee of Parke-Davis, Charles Schoolcraft. Mr. Schoolcraft relocated Therafirm to its current home in Ellerbe, North Carolina in August of 1996. Centrally located in one of the country’s largest textile manufacturing districts, this location allows Therafirm to employ the most qualified and experienced staff possible.

In February of 2000, Knit-Rite, Inc., one of the world’s leading manufacturers of Orthotic and Prosthetic textile interfaces, established a foot care products division when they acquired the TheraSock Diabetic Sock Line from TheraFoot Technologies.

Later that year, Knit-Rite also acquired Therafirm to complement the recently established foot care division. The combination of TheraFoot Technologies and Therafirm under the Knit-Rite umbrella established Therafirm, A Knit-Rite Company, as a leading provider of diabetic socks and compression hosiery to the HME/DME industry.