001A Trail Runner (Men's) Road By refining the way our

By refining the way our cutting-edge construction technique

The addition of a 3D chassis and CARBONFUSED® technology provides the perfect blend of features to elevate the skiing performance

utilizing over 250 studs to provide extra bite and increased durability

Birkenstock's best-selling clog in an ultra-lightweight style

Max Ring: 48 teeth

001A Trail Runner (Men's) Road By refining the way ourThe 001A is engineered with the lightest and strongest materials for mindless comfort on mindful pursuits. Optimally cushioned ultra distance shoe equipped with a proprietary Arnitel TPEE midsole that demonstrates benchmark resiliency, strength and mechanical property retention, along with the worlds first seamless Dyneema upper and an exclusive Vibram soleplate for unparalleled performance and durability. We recommend to go up 1 2 size (US) from your