The holiday season is a time when we take out the fancy clothes we rarely wear all year. For women this often means dresses, and slinky ones at that. Thin fabrics on these impressive frocks might be the most body-hugging things we wear all year.

This is where CASS comes in. CASS is a luxury shapewear company. What's shapewear? Shapewear is an undergarment you wear that nips, tucks and generally smooths and tones a shape without a minute in this gym.

And in this case we're showing the Cami Slip Dress by CASS. This slip dress is the ultimate shaper as it provides medium support from the bust to the thigh. It's the perfect undergarment to wear under a dress to keep a line or bump from marring your silhouette and the CASS Cami Slip Dress won't cling to fabrics and stays put all night long.

The CASS Cami Slip Dress works on all shapes but is best for sizes 0-12 with cup sizes A-C.