- Tart Collections black and white Iris bikini- Striped stretch-nylon- Top: padded cups tasseled trim- Briefs: low-rise tasseled trim lined at base- Ties at neck and back briefs tie at sides- 90% nylon 10% elastane- Hand wash- Lotion sunscreen oil and chlorine can cause discoloration of this item; this is not a manufacturing defect. Please follow care instructions to keep your swimwear in the best condition