My past 2 trips i went with Under Armour 4d foam sandals. Both trips were 9 days and i wore the sandals just about the whole time. They are comfortable and no blisters. My daughter also has a pair and loves them, she too wore them alot with no issues. This past trip we walked 10+ miles per day according to the pedometer, and at least 95% was in the sandals. I will always take a pair of sneakers, but hardly wear them, unless I know it will rain. I always bring mole skin in case my feet do start to blister.