The Aeris Solution foot system exceeds expectations by offering the best combination of value and performance in a 100% carbon composite foot. The Aeris Performance adds Compliant Composite Technology (CCT) that is derived by using multiple springs to increase the range of flexibility. The result is a unique Advanced Energy Release (AER) pylon design composed of nested parallel springs that enable the foot to react in a compliant manner at heel strike and then work together to create a dynamic transition from push-off to toe release. The AER pylon takes advantage of independent spring action to provide smooth, stable progression from heel-strike to toe-off. The Aeris Solution foot system will exceed expectations for the low to moderate activity user.