Thank you for showing your interest in Smart Knit Seamless Diabetic Crew Sock, Black, Xlg from Therafirm (TG). The Smart Knit Seamless Diabetic Crew Sock, Black, Xlg is a product of Therafirm and is thereby made of the highest quality. If you have any questions regarding Smart Knit Seamless Diabetic Crew Sock, Black, Xlg or any product in Therafirm (TG), please contact us. Our experienced personnel will answer any questions you have about Smart Knit Seamless Diabetic Crew Sock, Black, Xlg. Also, if you are interested in purchasing large quantities of Smart Knit Seamless Diabetic Crew Sock, Black, Xlg or any Therafirm (TG), please contact Customer Service.