i love these sandal and the price on amazon be amazing . i have own 5 pair of rainbow and this be my first pair of double stack . they be even better than the regular rainbow now i have 3 pair . if you wear sandal on a daily basis as i do you will appreciate the extra cushion of the double stack . warning : the sandal have a break in which they be kinda of uncomfertable and very snug , this insure a great fit after the break in .