AGGRESSIVE TRIPLE COMPOUND OUTSOLE Each section of the triple compound rubber outsole is designed to perform a specific function the best it possibly can. The forefoot rubber is formulated for increased grip with deep tread specifically shaped to grab the ground while shedding mud and debris. It wraps around the toes for additional protection against rocky terrain or when doing push-ups. The midfoot is formulated from a rock climbing compound and hardened for exceptional abrasion resistance — ideal for fast roping. The heel is more dense and formulated for extreme durability with an expanded heel strike area that won't break down over time or distance.