This bounce free back protector backpack is made for the adrenaline mountain biker. The Patriot 15L protects both your back and your gear when bombing the steepest hills or shredding the roughest terrain. This pack gives you total confidence with its multi-compliant CE-certified SAS-TEC central back protector (SC-1/CB52) made of flexible viscoelastic foam with memory effect that returns to its original shape after impact or deformation.