This second version of the Spectur differs from the original by having a much more cushioned feel, as well as being lighter and having a drop that's 2 mm higher than before - this helps even casual runners direct their motion forwards. The Energy Blade fiberglass plate in these shoes is also suitable for recreational runners, unlike the more aggressive carbon fiber plates found in elite racing shoes. However, it works on the same principlesomewhat like a springand slightly reduces the amount of energy required for running. - Heel to front drop: 8 mm - Reverse Camber design helps move quickly from landing to push-off - shorter ground contact time - Energy Foam cushion - Energy Blade fiberglass plate in the midsole completes the structure suitable for fast running - Ergonomic EVA insoles - Highly breathable surface fabric - Road Contagrip outsole provides good grip and is durable