The heel pad with the blue dot is intended to prevent pain in the heel bone area.
The extended arch cushion provides better arch support and better grip underneath your foot.
The "spur" is a lug protruding from the lower part of the heel bone (calcaneus) where the main tendon of the foot muscle is connected.
This heel pad is made of 100% silicone, with a softer blue dot in the center, which helps relieving the pain by releasing the strain of the body weight on the spur during walking/leaping.
The heel spur cushions are supplied in pairs which should be worn together, even if only one heel has a spur.
It is recommended to wear shoes with a soft heel, to stand walk or leap less, and to maintain correct body weight.