Chaco Men’s Z/2: Want the best sandal to do it all in? Here it is the Z-2 Why? Well……."BioCentric" footbeds and an easy open toe design provide a level of comfort and performance seldom found in sport sandals. Chacos infinitely-adjustable, pull-through strap system and a single buckle hold your feet securely in all kinds of conditions. Durable on and off-road sandals that will take you down the river or around the globe. NEW Unaweep Sole are 20% lighter!! Advantages: Unaweep sole is the product of merging the best of the old Colorado and Terreno soles. With Vibram® durability, the Unaweep outsole is a great combination of slip resistance, traction and light weight. Lug pattern and spacing makes this sole virtually self-cleaning.