The Peregrine 13 is versatile not only in the terrain it can tackle, but its users, too: it's suitable for many skill and fitness levels, starting from the level where trail running actually includes a lot of walking. The low drop, again, rewards the strong gait of an exerpienced runner. Compared to version number 12, this 13 boasts a bit more shock absorption at the front and midfoot, and is just a touch lighter. The cushion still emphasizes responsiveness over plushness. - Waterproof Gore-Tex membrane - PWRRUN shock absorption - PWRTRAC rubber out sole with a rough 5 mm tread pattern - Heel stack 28 mm, front stack 24 mm, drop 4 mm - The midsole offers protection from sharp terrain features