Design flaw = impossible to put on
As other reviews have noted, the back straps of this dress are so tight that it's not physically possible to put the dress on either over your head or by stepping into it. This is clearly a design flaw that the manufacturer didn't think about. Do not order.
Response from Lulus.com:
Hi Sara, thank you for sharing your feedback with us! We're so sorry this dress ran too tight for you. We want you to love every Lulus purchase, so if you are ever in need, please get in touch with us (lulus.com/customerservice). We would be happy to find a solution for you! xo