Rachel Allan 70786 triacetate prom dresses are offered in Emerald, Periwinkle, Red, Yellow. $398 is the Formal Approach best price guarantee for style 70786 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70786 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.