Spring-backed footwear insole

An insole for placement in footwear above the midsole of the footwear, the insole comprising:

• a toe region, a metatarsal region, a mid-region, and a heel region;
• a cushion layer extending from the toe region of the insole to the heel region of the insole, the cushion layer having a top surface and a bottom surface;
• and
• a spring plate secured below the top surface of the cushion layer, the spring plate having a generally longitudinally extending slot in the toe region, the slot separating at least a portion of a big-toe region of the spring plate from the remainder of the toe region of the spring plate.

An insole for placement in footwear above a midsole of the footwear, the insole comprising:

• a toe region, a metatarsal region, an arch region, and a heel region;
• a cushion layer extending from the toe region to the heel region of the insole, the cushion layer having a top surface and a bottom surface;
• a spring plate secured below the top surface of the cushion layer, the spring layer extending from the toe region through the arch region of the insole;
• and
• a cupping support member extending longitudinally across the heel region and the arch region of the insole, the cupping support member overlapping with a rearward end of the spring plate.

An insole for placement in a footwear above a midsole of the footwear, the insole comprising:

• a toe region, a metatarsal region, an arch region, and a heel region;
• a cushion layer extending from the toe region to the heel region of the insole, the cushion layer having a top surface and a bottom surface;
• and
• a spring plate secured below the top surface of the cushion layer, the spring layer extending from the toe region to the heel region of the insole, wherein a rearward portion of the spring plate at least in the heel region includes a split forming a medial arm and a lateral arm.