Our Gusset can hold up to 10 ml liquid; 2 regular tampon or 3 light tampons before we recommend changing.However, how long it will take your swimwear to reach maximum absorbency is different for each person and their period. To better understand the absorbency and leak protection of our products with your flow, we recommend wearing your MYSS purchase at home in and out of the pool or shower for a few hours to figure out what works best for you.We do not advertise our product as a complete replacement for other sanitary products.