With any product that gets wet or is subjected to moisture, mold growth is a risk. For this reason, look for a shower cap that has antibacterial properties and/or can withstand a wash. It is possible to also clean your shower cap by hand in hot soapy water if you are concerned about it being tossed into the washing machine, but if you’d prefer to let the machine do the work, look for one labeled as machine wash friendly. When choosing a shower cap, the fit is your first concern. A shower cap that is too tight will be uncomfortable, itchy, and could irritate your skin. After all, an ill-fitting shower cap might let water or humidity inside, defeating the purpose of wearing it. It’s good to measure your head if you’re unsure how small or large yours is compared to the shower cap you intend on purchasing. You want to make sure what you get is snug so you don't leave room for water or humidity to creep in and frizz up your hair. But, you also don't want something that's so tight you cringe every time you use it. Some shower caps are so delicate you can only hand wash them, while others you can simply throw in the wash. Because shower caps are always getting wet, some of them may be prone to mold growth unless the shower cap specifically boasts antibacterial properties.

When shopping for a shower cap, you want to keep in mind what size you want it to be. Do you have longer hair, shorter, a style that requires more space? Taking your answer in to consideration will help you narrow down your options, as shower caps do come in different sizes. So, when shopping for a shower cap, you want to keep your preferences in mind for how often and how it needs to be washed.