Your shower curtain liner spends a lot of time in direct contact with water, so ideally it should be able to handle a lot of moisture without developing mildew or mold over time. The best mildew-resistant shower curtain liners can do just that — but your options are actually more varied than you might think.
For a truly long-lasting, water-resistant liner that defies mold and mildew and makes your shower way more hygienic, it's important to pay attention to the materials used. Although all fabrics can be treated to be mildew-resistant, each has other pros and cons.Most liners are made of one of three materials: polyester, polyethylene (PE), or polyethylene vinyl acetate (PEVA).
A polyester liner provides a woven feel and can take the place of your shower curtain in many instances. It's water-repellent, but not entirely waterproof. Although some people find fabric liners more attractive than plastic liners, they need to be machine washed and unlike their plastic counterparts don't stick to the inside of the tub (which helps keep water from spraying out). PE and PEVA, on the other hand, are both types of plastic that are great for shower liners as they're waterproof, easy to wipe clean as needed, and do a better job of keep your bathroom floors dry. Of the two, PE has a thinner, more flexible feel.