Sakkas Women's Seamless Bio-Crystals Firm Control Lace Hem Full Slip Dress Imported Please refer to the size chart photo to select the correct size. Features adjustable shoulder straps, full bust coverage, firm control body panel and feminine lace hem. Naturally lifts up the bust, contours the waist, tummy and hips for a slimmer appearance. Fashion shapewear minimizes lumps and bumps under clothing, shapes, lifts and contours your body and makes you feel more confident. Q: What are bio-crystals? A: Bio-crystals are the combination of precious metals such as aluminum, titanium and platinum which produce infrared rays activating body molecules and cells. Daily use of undergarments with Bio-crystals will improve circulation, elasticity and appearance of the skin while preventing broken blood vessels and fatigue. Material: 87% Nylon 13% Spandex. Handwash Only. Imported.