Rachel Allan 70857 luxe lycra jersey prom dresses are offered in Black, Emerald, Royal, Watermelon. $658 is the Formal Approach best price guarantee for style 70857 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70857 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.