Boreal s Zephyr Climbing Shoe is just like the classics that saw first ascents on Astroman, Levitation 29, and The Obelisk. This old-school shoe has a if it ain t broke don t fix it mantra with a comfortable, symmetric shape that sends cracks, edges, and slabs with a legendary prowess. The only update Zephyr sports is Boreal s FS-Quattro rubber sole for longer-lasting quality. Its split leather upper prevents stretching due to its unique stitching, and there s a bit of canvas inside the shoe for breathability and durability. The full insole and midsole provide plenty of support for multi-pitches.