The Camp Four features Five Tens own exclusive technology. Starting at the rear, his shoe has a moulded PU external heel cage that adds rear-foot support & stability. Its upper is made from nubuck leather that has a lace-to-toe closure that can be worn relaxed for a long-distance fit, or cinched tight for climbing & scrambling. Underneath, the sole unit is comprised of two different Five Ten signature Stealth rubber compounds; Firstly Five Ten have placed Stealth C4, that they use on their climbing shoe range, around the toe area. This rubber is mega sticky & has made some of worlds hardest climbs possible! Secondly the have used Stealth S1 for the rest of the sole unit. S1 is ideal for hiking because it absorbs more shock than a traditional rubber outsole. It is still a high friction rubber like the C4 but has been designed to be a bit longer lasting to take the abuse of long distance walking. PU moulded heel cage for rear-foot support & stability. Nubuck Leather upper Lace-to-toe closure for fine tune fitting Stealth C4 climbing zone Sealth S1 main sole unit