Article of footwear for use with a prosthetic

An article of footwear for a prosthesis, the article of footwear comprising:

• an upper;
• an outsole attached to said upper;
• a midsole disposed between said upper and said outsole;
• and
• a first fastening device extending from said midsole and configured at a proximate end of the midsole to selectively engage the prosthesis in an engaged state to restrict removal of the prosthesis from the article of footwear, wherein an outer width of the article of footwear increases from the proximate end of the midsole along a longitudinal axis of the midsole to a distal end of the midsole;
• and
• a cavity defined between said upper and said midsole, said cavity including a constant width and a substantially rectangular cross section configured to matingly receive the prosthesis.

An article of footwear for a prosthesis, the article of footwear comprising:

• an upper;
• an outsole attached to said upper;
• a midsole disposed between said upper and said outsole;
• and
• a cavity defined between said upper and said midsole and including a substantially rectangular cross section, said cavity configured to matingly receive the prosthesis into an opening defined at a proximate end of the midsole, wherein an outer width of the outsole increases from the proximate end of the midsole along a longitudinal axis of the midsole to a distal end of the midsole;
• and
• wherein said cavity includes a substantially constant dimension between said Upper and said midsole along the length of said cavity, said cavity extending in a direction substantially parallel to a longitudinal axis of said midsole.