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Zenith is a unique high performance climbing rubber compound developed by Boreal. This compound provides outstanding friction and excellent hold on small edges.

Zenith rubber is a high performance rubber developed by Boreal. Zenith is designed for no-compromise performance, and features incredible friction properties combined with an ability to hold micro edges. This ultimate compound is featured on our highest performance rock shoe models. 


Ref. 11408 SILEX

The Silex has long been established as a ‘go-to’ shoe for climbing long routes in comfort, and the latest updates ensure it maintains this status. Silex offers a perfect blend of fit, support and precision making it ideal for those operating in the mid grades to push their skills without sacrificing comfort. 

Product Info
  • UPPERS Split leather with recycled Air Net side for increased ventilation. Strap closure for a fast yet comfortable fit 

  • LINING 3D recycled lining for more breathability and comfort

    CONSTRUCTION Slip-Lasted

  • MIDSOLE Special anti-deformation recycled midsole

  • SOLE Sticky yet durable Boreal ZENITH Quattro outsole. 4-4.5 mm thickness depending on size. Middle part of the outsole with recycled rubber

  • CHARACTERISTICS A stiff and supportive shoe with superior comfort and breathability. Strap closure provides a fast and secure fit

  • USAGE Designed for day long use indoors or outdoors. Perfect for long crag days, multi-pitch climbs and extended training sessions

    WEIGHT 626 gr. pair. Size 71⁄2 U.K.


  • Silex is constructed with a premium quality split leather upper and a fast and secure triple strap closure. The wide fastening area allows a further degree of adjustment for a strap closure shoe, to help accommodate a wide variety of foot shapes.

    This semi-flat lasted shoe incorporates a stiff midsole with concaved forefoot, enhancing support and placing the toes into a subtly more powerful position.

  • The sole unit features a large section of our recycled Eco rubber, while sticky Zenith Quattro is used in the climbing zones at forefoot and heel.

    Silex is the perfect choice for those looking to step up their route climbing performance, without sacrificing all-day comfort.

Boreal Silex and Silex Wmns
Boreal Outdoor

Josh Ibbertson gives us all the technical details for the Silex and Silex Wmns.