Rachel Allan 70720 stretch satin jersey prom dresses are offered in Black, Cloud Blue, Gold, Hot Pink, Lilac, Royal. $438 is the Formal Approach best price guarantee for style 70720 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70720 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.