Nike | BELLA KAI { FLIP FLOPSSPORTY, CASUAL COMFORT. The Bella Kai delivers the underfoot comfort of dual density foam in a casual flip flop, ideal for all day wear in warm weather. Soft, lined straps provide a secure fit, while the herringbone texture on the footbed and outsole add grip instead of slip. Synthetic and textile upper has soft lined straps to comfortably secure your foot. Footbed shape is specifically designed for a woman's foot. Supersoft dual density foam delivers