At least one of the pair of shoes has a back portion of the shoe, cut from the collar of the back portion (the top of a shoe above the shoe-heel [the heel of the shoe]), and runs down the back of the shoe. The cut forms a slit running down the back portion of the shoe, forming a right-back portion and a left-back portion of the shoe. The right-side edge of the right-back portion and the left-side edge of the left-back portion are separable from the foot being inserted into the shoe. The right-side edge and the left-side edge return back to their positions when the foot is taken off or when the foot is fully inserted, not overlapping each other when the slit is not separated.
1. A pair of shoes comprising of a shoe, wherein the shoe has a back portion designed to accept a back-heel of a foot, wherein the back portion comprises of a right-back portion and a left-back portion, wherein the right-back portion and the left-back portion form a slit so that the right-back portion having a right-side edge is separable from a left-side edge of the left-back portion, wherein the slit runs up to a collar so that the right-side edge of the right-back portion is separable from the left-side edge of the left-back portion at the collar, wherein the slit forms an opening, wherein the right-side edge of the right-back portion and the left-side edge of the left-back portion form the opening, and wherein the opening is located between a lower part of the slit and a upper part of the slit.
2. The pair of shoes of claim 1 , wherein the upper part of the slit is longer in length than the lower part of the slit.
3. A pair of shoes comprising of a shoe, wherein the shoe has a back portion designed to accept a back-heel of a foot, wherein the back portion comprises of a right-back portion and a left-back portion, wherein the right-back portion and the left-back portion form a slit so that the right-back portion having a right-side edge is separable from a left-side edge of the left-back portion, wherein a stretchable material is attached to a inside of the back portion, overlapping both the right-back portion and the left-back portion, wherein the stretchable material provides elasticity to separate the slit apart when the back-heel of the foot is pushed into the shoe and to pull the slit back together after the foot is inserted into the shoe, wherein the slit runs up to a collar so that the right-side edge of the right-back portion is separable from the left-side edge of the left-back portion at the collar, wherein the slit forms an opening, wherein the right-side edge of the right-back portion and the left-side edge of the left-back portion form the opening, and wherein the opening is located between a lower part of the slit and a upper part of the slit.
4. The pair of shoes of claim 3 , wherein the upper part of the slit is longer in length than the lower part of the slit.
5. A pair of shoes comprising of a shoe, wherein the shoe has a back portion designed to accept a back-heel of a foot, wherein the back portion comprises of a right-back portion and a left-back portion, wherein the right-back portion and the left-back portion form a slit so that the right-back portion having a right-side edge is separable from a left-side edge of the left-back portion, wherein the right-back portion extends upward to form a right lip and the left-back portion extends upward to form a left lip, wherein the right lip and the left lip form a elongated-collar region above and away from a shoe-heel, wherein the slit runs up to a collar so that the right-side edge of the right-back portion is separable from the left-side edge of the left-back portion at the collar, wherein the slit forms an opening, wherein the right-side edge of the right-back portion and the left-side edge of the left-back portion form the opening, and wherein the opening is located between a lower part of the slit and a upper part of the slit.
6. The pair of shoes of claim 5 , wherein the upper part of the slit is longer in length than the lower part of the slit.
7. A pair of shoes comprising of a shoe, wherein the shoe has a back portion designed to accept a back-heel of a foot, wherein the back portion comprises of a right-back portion and a left-back portion, wherein the right-back portion and the left-back portion form a slit, wherein the right-back portion has a right-side edge and the left-back portion has a left-side edge, wherein the right-side edge and the left-side edge are separable from the foot inserted into the shoe and wherein the right-side edge and the left-side edge do not overlap when the slit is not separated, wherein the slit runs up to a collar so that the right-side edge of the right-back portion is separable from the left-side edge of the left-back portion at the collar, wherein a stretchable material is attached to a inside of the back portion, overlapping both the right-back portion and the left-back portion, wherein the stretchable material provides elasticity to separate the slit apart when the back-heel of the foot is pushed into the shoe and to pull the slit back together after the foot is inserted into the shoe, wherein the slit forms an opening, wherein the right-side edge of the right-back portion and the left-side edge of the left-back portion form the opening, and wherein the opening is located between a lower part of the slit and a upper part of the slit and wherein the upper part of the slit is longer in length than the lower part of the slit.