- 91% FSC Certified Viscose, 9% Elastane - Round Neckline - Midi Length - Slim Fit - Fitted Waist - Sleeveless - Unlined - Crystal Embellishment The Sapphire Serpent Jersey Scoop Neck Tank Dress is a sinuous column with a softly sculptural shape, designed to flatter and elongate. Inspired by the vibrant palette of Spanish tiles, embroidery and adornment, it is hand-finished with artisanal precision.