I've had several pairs of old Chacos (Z/1, Z/2, Yampa, Unaweep) and the Z/Volv seems to be half a size larger. They were a bit big and unfortunately I'm already a size 7 so I can't go smaller. Had to send them back :( The lighter sole on them is good but surprisingly doesn't really offer more cushioning or softness compared to the classic. They also don't seem that durable so I'm happy to stick with my unaweeps. I just hope Chaco doesn't everything will switch to this new sole!
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