Mammut W Aenergy Trail Endurance Ultra Low sidas Large main compartment for all

Large main compartment for all your gear

with a regular fit to reduce restriction

The padded Custom Caddi™ 3D ankle strap provides a supremely comfortable and secure feel when the consequences are high

Advanced Aluminum Buckle - aircraft quality aluminum is light and low-profile

Versatile Shape

Mammut W Aenergy Trail Endurance Ultra Low sidas Large main compartment for allDesigned for performance on mid to long distance trail runs. A Flextron PRO propulsion plate delivers powerful energy return and dynamic forefoot flex while providing just the right amount of torsional stability. The dual density foam combines lightweight Mammut CORE Ultra foam with Mammut CORE Plus foam, offering excellent rebound for enhanced comfort and responsiveness, along with outstanding cushioning whether running 10k or over 30k. Built for