The already well-loved Timp just stepped it up a notch. Altra has softened the cushion and decreased the heel counter for a more flexible ride and better feel underfoot. The brand new multi-directional flex mesh upper coupled with an improved asymmetrical lacing pattern means you get enhanced performance and a better fit. With the 4-Point GaiterTrap(TM) and improved DuraTread(TM) outsole you can confidently run through dirt and debris with protection and traction. Features: - Multi-Directional Mesh upper - Balanced cushioning and zero drop design encourages proper, low-impact form - Footshape toebox allows your toes to relax and spread out naturally for more comfort and stability in uphill climbs and downhill descents. - EVA midsole - Trailclaw canted lugs are positioned strategically beneath the metatarsals to provide traction at toe off. - DuraTread outsole - GaiterTrap hook-and-loop trap allows strapless gaiter attachment - 5mm Contour Footbed - Stack Height: 29mm - Weight: 8.7 z / 247g