Perfect for pushing yourself to test your abilities, the Boreal Silex is features a premium quality split leather upper and a fast yet secure speed lace closure system.Underfoot boasts a sticky yet durable Boreal ZENITH Quattro outsole made from recycled rubber, for great traction.A stiff and supportive shoe with superior comfort and breathabilitySplit leather upper with recycled AirNet panels- For increased ventilation3D recycled lining- For more breathability and comfortSpecial anti-deformation recycled midsoleSticky yet durable Boreal ZENITH Quattro outsole - 4-4.5 mm thickness depending on sizeCentral part of the outsole is made with recycled rubberAnatomically sculpted pieces of foam padding- Hold the heel comfortably and securely in place to avoid unwanted movementLace closure- For a precise yet comfortable fitSlip-Lasted build