Spencore material exclusive cushioning layer absorbs shock and impact to provide maximum comfort. metatarsal arch cookie specially shaped cushion to provide comfort and support where the metatarsal arch needs it most. 4-way stretch fabric with silpure antimicrobial helps prevent blisters while controlling odor. contoured metatarsal arch support. consumers suffering from metatarsal arch tenderness or pain. consumers seeking all day forefoot comfort and cushioning.