Simply beautiful, this open-back long navy blue prom dress is high on style, not on price. At under $100, this junior-sized long formal dress offers an upscale look for prom, fancy wedding receptions, and other black-tie events while allowing you to stick to your budget. With a high-neck bodice and cut-out shoulders, this long formal dress has thin shoulder straps that criss-cross the open back, while the long skirt smooths over the hips before opening in a side slit and ending in a small train. Combining refined styling with affordability, this open-back long navy blue prom dress is a testament to the modern woman who is as smart as she is stylish.