Steadfast, strong, and a softy at heart. The Spectana is Puma’s most stable trainer. Maximum stability comes from their patented M2D+ medial support technology. It’s a lightweight, unrestricted, and self-tuning material design that works like corrugated cardboard - the inner ridges combine structural rigidity with superior cushioning when and where you need it. For maximum cushioning, they’ve lined the Spectana with full-length IdCELL and a dual layer OrthoLite® X40 Sockliner. Plus, they’ve added a few millimeters more blown rubber in the forefoot to guarantee comfort.