TAVIK Swimwear Heather Bikini Bottom in Slate. - size L (also in ) TAVIK Swimwear Heather Bikini Bottom in Slate. - size L (also in ) 80% nylon 20% spandex. Hand wash cold. Stretch fit. TAVI-WX265. TVK WBE1801. Beach born and city raised, TAVIK is a premium swimwear and apparel brand inspired by modern beach culture. TAVIK Women?s collections are as edgy and sexy as they are minimal and classic. They are designed as timeless pieces that effortlessly transition from day to night.