What makes o.b. tampons protect so well? It’s the smart design! o.b. tampons’ FLUIDLOCK grooves guide fluid into the core for up to 8 hours of leak protection. Meanwhile this inner core, is made with rolled layers that expand all around to custom-fit the unique shape of each woman. o.b.’s protective pocket surrounds your finger with soft fibers while you insert, to help you stay clean and protected and with no applicator, o.b. tampons produce less waste – protection for your and the environment. o.b. tampons come in four different absorbency levels: Regular, Super, Super Plus, and Ultra.