Period underwear: how to choose it and what to buy
Period underwear is underwear with absorbent layers that replaces or backs up pads and tampons. How to choose absorbency, fabric, size and care, with options on Amazon.
What period underwear is
Period underwear is underwear with several layers: one that touches the skin, one that absorbs the flow and an outer one that stops leaks. You can wear it on its own or as backup for a tampon or a cup, and it needs no pad.
It can also be used on spotting days, for postpartum bleeding and for light bladder leaks, as long as the product listing says so. Every brand states what its own is for: read the listing and don't assume.
Our pick
Bambody: bamboo rayon period underwear
According to the listing, bamboo rayon period underwear with up to 24 hours of protection, for women. This link goes to the 3-pack, large size version; on the page you can choose another size.
Check before you buy
- The size and number of pieces in the pack: the link opens one specific variant.
- The absorbency level the listing gives for THAT version.
- The one- and two-star reviews: if they repeat the same problem, skip it.
- Whether the listing states it uses no PFAS, and what exactly it says.
- The return policy for THIS item before you pay.
Prices and availability change: always check the current price on Amazon.
Our pick
TIICHOO: period underwear, 5-pack
According to the listing, for heavy flow, overnight, teens and light leaks: 50 ml absorbency, 4 layers, soft rayon, front-to-back coverage and «PFAS-free», in a 5-color pack.
Check before you buy
- Your size on the seller's chart: the link opens one specific variant.
- That 50 ml is the manufacturer's figure and can't be compared with other brands.
- The one- and two-star reviews, especially those about leaks and fit.
- That «PFAS-free» is the seller's claim: read exactly what the listing says.
- The return policy for THIS item before you pay.
Prices and availability change: always check the current price on Amazon.
How much absorbency you need
Brands give absorbency in milliliters or compare it to tampons. Those figures come from each manufacturer and can't be compared across brands, so treat them as a guide, not a guarantee.
For reference, the FDA classes a regular tampon at 6 to 9 grams of absorbency. For light or spotting days a thin pair is enough; for heavy flow or overnight, look for more layers and more coverage at the back.
If you're unsure, start with a medium pair and an overnight pair and adjust with what you learn in your first cycle.
Fabric, layers and what the label says
The layer on your skin is usually cotton or a fiber such as bamboo rayon, which feels soft and breathes better than polyester. The outer layer is the one that stops leaks.
Some products of this kind have been in debates about PFAS, the so-called «forever chemicals». If it matters to you, pick a brand that explicitly says it doesn't use them and check that line on the listing: it's a manufacturer claim we can't verify here.
Cut and size
The cut changes the coverage: hipster and full-coverage styles cover more and work better overnight; bikini is more discreet for daytime; thongs cover little and rarely suit heavy flow.
Follow the seller's size chart, not another brand's, because they differ. If you're between two sizes, read the reviews that mention fit and think about how your other underwear fits.
How to care for it
The usual advice, always following your garment's label, is to rinse it in cold water after use and wash it afterwards without fabric softener, which can reduce absorbency. Air dry or use low heat.
For a full cycle you usually need three to five pairs, depending on your flow and how often you do laundry.
When to talk to a doctor
If you soak a pad or tampon every hour for several hours in a row, if your periods are very painful or if something has changed suddenly in your bleeding, talk to a health professional. A product is no substitute for a check-up.