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Sigma Climbing Shoe

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Why We Like The Ocun Sigma Climbing Shoe

When standing on razor-thin edges, maintaining tension with cheeky toe hooks, and doing so for multiple pitches, we're thankful to have the Ocun Sigma Climbing Shoe laced to our feet. The unique split-sole design features a sole that extends two-thirds of the way toward the heel rather than stopping short of the arch, giving us the support we need to fight off fatigue on long climbs while still maintaining flexibility for reliable hooks. Equipped with a dual-layer midsole, this shoe not only drives power to the toe but has a midsole layer that curves up over the sides to also drive power into the edges. The closure system has the laces offset, eliminating pressure points on the top of our foot and making room for a generous 3D-printed toe patch.


  • Edging demon of a shoe for long sport routes
  • Aggressive downturned profile boosts power and precision
  • Vibram XS Grip rubber bites into micro edges, even in the cold
  • Innovative split sole design provides more midfoot support
  • Dual-layer midsole inserts drive power to the toe and edges
  • Redesigned heel strap provides toe-to-heel tension
  • Internal stretch bootie helps eliminate dead space
  • Lace pocket on tongue keeps you streamlined
  • Item #OCN005T
3D, dual layer
Vibram XS Grip
Asymmetrical Curvature
Manufacturer Warranty
limited 2 year

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