- 92% FSC Certified Viscose, 8% Elastane - Round Neckline - Relaxed Fit - Batwing Sleeve - Unlined - Cold Shoulder Detail - Crystal Embellishment Introducing The Sapphire Serpent Bat Sleeve Kaftan With Cold Shoulder, a beguiling silken shapeshifter that falls with natural, graceful movement. Our in-house artisans reimagined the evocative colour and ornate pattern of Spanish design, elevating the print with intricate embellishment.