Neat Feats Orthotics innovative EVA-Cushioning Spur Pads catch the shock forces and distribute them evenly throughout your heel and arch to reduce trauma. The EVA-Cushioning construction allows the heel spur pad to compress with each step to absorb shock while it cradles and supports sore heels caused by heel spur syndrome. The donut estention relieves heel spur pressure and inflamation that makes standing and walking painful. EVA-Cushioning Spur Pads also provide arch support and relieve foot, ankle, leg and back pain from every day heel strike. The large size fits female 11-13 and male 10-13. The medium size (fits female 6-10 and male 6-9)