Light, packable jacks that are also sufficiently durable thanks to the Cr-Mo steel used. Modified construction for lower weight and longer life under repeated loads. The reduced profile of the spikes provides better stability when walking. They allow for tool-free size adjustment. Simple tightening and loosening of the strap thanks to the stainless steel patented Rock&Lock buckle. The asymmetric shape of the cat optimally copies your shoe and provides maximum support in more demanding terrain.