H&M Trend Conscious Fitted Ribbed Stretchy Orange Dress sz XS S M L XL
Kourtney wearing something very similar if not the same. 

Description

Fitted dress in a soft rib knit with a sheen. Shoulder straps and scoop neck at front and back.

Details

86% rayon, 12% nylon, 2% spandex. Machine wash cold

Imported