Waterproof Hiking Daypack for the Big Adventures. HAJKER PRO is a waterproof ultra-durable daypack with a rolltop opening, made for high-speed activities and gnarly expeditions. It's equipped with the bounce-free No Dancing Monkey™ 2.1 harness system and waist support belt that makes the pack stay put on your back without cramping your style. The pack is so lightweight and strong thanks to main fabric; the technical ROBIC + UHMWPE EXTREEMA NYLON, a fabric for the most extreme conditions. You could almost say that the HAJKER PRO is as made of steel! Zero bounce with No Dancing Monkey™ 2.0 and Snug Me - Harness developed and tested with top athletes to give you the perfect fit with no compromises, with absolutely no bounce. NDM Buckle - Technical buckle for a more secure closure and a better fit.