The backup pair works with your pad, tampon or cup — not instead of it.

Asked before buying

Everything is open on this page; nothing to click. Find your topic by its ribbon.

The lining

Do I still need a pad or tampon?

Yes. Our listings say so plainly: add your pad or tampon, and the brief protects you if there is an overflow. We call it a backup pair for that reason.

The lining

Where exactly is the lining?

Behind the gusset, running from the front panel to the back. In the teen cut it starts higher in front and ends further up the back.

The lining

Is there a published absorbency figure?

No. None of our listings gives a capacity in millilitres, so we do not quote one. Our layers page sets out what each listing does state.

Choosing

Jacquard, bamboo viscose or mesh?

Jacquard is patterned and has three layers in the gusset. Bamboo viscose is plain and thin. Mesh has tiny holes for airflow. The lining idea is the same in all three.

Choosing

Why so many colour sets?

Because the listing offers them, and because a mixed set tells you at a glance which pair is clean. Each set has its own page here.

Choosing

Can I wear them when I am not on my period?

Our mesh listing says it is possible to wear period panties every day if you want the extra protection. Plenty of people do.

Fit

How do I measure?

Tape around the fullest part of your hips. Jacquard and mesh briefs are charted from X-Small at 32 to 33.5 inches to 5X-Large at 48 to 49.5 inches.

Fit

I am between sizes.

A backup works when the lining sits close, so the smaller size is usually the better guess. If you are unsure, write to us with your measurement.

Fit

What ages is the teen line for?

Eight to sixteen. XS is for 8 to 10 years, S for 10 to 12, M for 12 to 14, L and XL for 14 to 16.

Care

Can they go in the dryer?

No. The bamboo viscose listing is blunt about it: the tumble dryer damages the lining. Air dry every time.

Care

Machine or hand wash?

Either works for the period briefs. Our cotton G-string listing says hand wash only, and the teen listing recommends hand washing when you can.

Care

How many pairs make a sensible rotation?

Three if you wash daily, five if you would rather not. A pair needs most of a day to air dry.

In the water

Can I swim in period briefs?

Use the swimwear instead. Our swim bottoms have a four-layer gusset in quick-drying nylon and spandex.

In the water

What sizes are the swim pieces?

Swim bottoms are charted from XS to 4XL by waist. The one piece is listed in S, XL and 2XL.

Ordering

Where do I actually buy?

On our product listing at the partner store. Every button on this site opens it.

Ordering

Who do I ask about delivery or a refund?

The store. Orders, tracking, exchanges and refunds all live in your account there.

Ordering

Why might a price here differ?

Prices change. We refresh ours from the listing, but the checkout shows the one that counts.