Frequently asked questions

Go by your measurements rather than your jeans size: waist at the narrowest point, hips at the widest point.

If you are between two sizes, choose the larger one: tighter panties are not more leakproof. Our panties go from XS (34) to XXL (44), and up to 5XL (50) on Séléné. The “Find my size” button on each product page does the maths for you.

See the size guide

Each pair shows its absorbency in tampon equivalents:

• Light, 1 tampon (start or end of your period, light discharge): Aphrodite thong, Vega tanga.
• Medium, 2 tampons (less than one pad or tampon every 3 hours): Séléné, Amphitrite, Calliope, Ara.
• Heavy, 4 tampons (more than one pad or tampon every 3 hours): Artémis, Héméra, Léto, Aquilla.
• Very heavy, 6 tampons: Hécate (150 ml), and Lucina for teens.

If in doubt, go one level up. Many customers wear a heavy flow pair on the first days and a medium flow pair afterwards.

How to choose your period panties

Up to 12 hours for the microfibre range and up to 8 hours for the organic cotton range, depending on your flow and the style.

On heavier days, change sooner or choose a more absorbent style.

They replace pads, tampons or cups thanks to three materials assembled without seams in the absorbent area.

• The wicking layer, against the skin, lets the flow through and dries straight away.
• The absorbent material holds it and limits odours.
• The waterproof membrane stops anything getting through to the outside.

Discover our technology

The teen range (10/12, 12/14 and 14/16) is narrower at the hips and thighs. A girl who has already developed, or is older than 14/16, will often be better in an adult XS or S. The One size fits from 10 to 16 years.

Three at least, ideally five, so you can wear one while the others dry.

With a cup or a tampon, yes, on very heavy days. With a disposable pad, no: its adhesive clogs the absorbent area.

Yes, they also absorb everyday discharge and light bladder leaks.

The MOVE collection is designed for sport: Active panties up to 8 hours, Perf panties up to 12 hours, plus shorts, cycling shorts and leggings with built-in panties.

Our period swimwear absorbs the equivalent of 4 tampons, for up to 12 hours, with no other protection, and resists chlorine and salt water.

The materials come from France and Italy, are all certified OEKO-TEX STANDARD 100 and contain no silver nanoparticles; the cotton range is made of GOTS-certified organic cotton.

The panties are designed in Paris with a textile engineer and made in Tunisia, in a factory that is regularly audited.

For three reasons: comfort, invisibility under leggings, and a waterproof membrane never pierced by a needle. Only the absorbent area has several layers; the rest of the panties is a single layer.

1. Wash them once before wearing them for the first time.
2. After wearing, rinse them in cold water until the water runs clear. Never use hot water.
3. Machine wash cold or at 30 °C on a delicate programme, in a laundry bag, with the rest of your laundry. Or by hand.
4. Use a regular detergent. No Marseille or Aleppo soap, glycerine or fabric softener: they clog the fibres. White vinegar, bleach and soda crystals damage the materials.
5. Air dry, never in a tumble dryer or on a radiator.

How to care for your period panties

3 to 5 years depending on care, if you alternate several pairs. Lower absorbency or a stretched fabric are signs it is time to replace them.

Three causes come up most often: a size slightly too big (the absorbent area must fit snugly), an oily soap or fabric softener that stops the material absorbing, or a flow heavier than the style can hold.

Write to us at contact@smoon-lingerie.com: we will look for the cause with you, and our 60-day satisfied or refunded guarantee applies.

Most often, the absorbent material is clogged by fabric softener or an oily soap. Rinse them thoroughly in cold water, then wash them again with a regular detergent, without softener. For a stubborn stain, a little bicarbonate of soda now and then.

Mondial Relay pick-up point delivery is free from €49 (€4.95 below that) in France, Belgium, Luxembourg, the Netherlands, Germany, Spain and Italy.

Home delivery is free from €100 (€5.90 in France, €7.90 in these neighbouring countries).

All delivery rates

To France, the French overseas territories, all of Europe, the United Kingdom, Switzerland, Canada, the United States, Japan and much of the rest of the world. The rate is shown at checkout, based on your address.

Your order is prepared within 72 hours, and you receive a tracking email when it ships. Then allow 3 to 5 working days for home delivery in France and Europe (2 days with express), and 3 to 10 days to the French overseas territories.

Yes, within 30 minutes of placing it: write to us quickly at contact@smoon-lingerie.com. After that, it goes into preparation; you can still exchange or return it when it arrives.

In the European Union, no: VAT is included. In Switzerland, customs duties may be charged on delivery, at your expense. In the United Kingdom, customs duties apply above €150.

First check your tracking link, your letterbox and your neighbours; at a pick-up point, the parcel waits for you for 7 to 14 days.

Still nothing? Write to us at contact@smoon-lingerie.com within 15 days of the shipping email: we open an investigation with the carrier and, if the parcel cannot be found, we send your order again or refund you.

Keep everything, take a photo of the contents and the packaging, and send it to contact@smoon-lingerie.com. If the mistake is ours, we send you the right item and the return is on us.

In tissue paper and a cardboard envelope, with no plastic.

Exchanges are free from anywhere in Europe, within 30 days of delivery, for items that have not been worn or washed.

Make your request on our returns portal with your order number and email, no account needed: the label arrives by email. Your new item ships within 10 working days of your parcel reaching us.

Within 30 days of delivery, for items that have not been worn or washed, through the same returns portal. €4.90 in return costs is deducted from the refund: you have nothing extra to pay.

If the return takes a pack below its discount tier, the discount is recalculated.

For 60 days, you can wear and wash one product per category (panties, swimwear, sportswear). If it doesn't suit you, send it back washed and we refund it.

The other products in the same category, never worn, can come back with it to be refunded, or stay with you. Write to us at contact@smoon-lingerie.com to use it; €4.90 in return costs is deducted.

All about the guarantee

Within 10 working days of your parcel reaching our warehouse, to your original payment method. Your bank then takes a few days to credit the amount.

A free product cannot be exchanged, and it must be returned if the whole order is refunded.

During a "buy 2, get 1 free" offer, partial refunds are not possible: we offer a credit note or an exchange for a product of the same price. The satisfied or refunded guarantee still applies.

Contact the store where you bought it (Etam, Monoprix, pharmacy, retailer): its own returns policy applies.

From Switzerland, ask contact@smoon-lingerie.com for your label and customs documents, otherwise customs fees will be deducted from your refund.

From outside Europe and the French overseas territories, the return is at your expense, with the invoice, to SMOON LINGERIE, 96 avenue de la République, 75011 Paris, France.

Choose your products freely from the custom pack collection: -10% from 3 items, -15% from 5, -20% from 7, applied automatically in the cart.

One code per order. Codes cannot be combined with custom pack discounts, except SMOON10. Some codes, such as SMOON10, are for a first order only, and most can be used just once.

If yours should work, write to us at contact@smoon-lingerie.com.

Share your link from the referral page: your friend gets a €10 voucher for her first order, and you get yours when her order ships.

Yes, e-gift cards of €10, €35, €50 or €90, valid for one year on the whole site.

Give a gift card

Enter your email address on the login page: you receive a one-time code, with no password. Nothing received? Check your spam folder, or you may have ordered without creating an account.

You do not need an account to track or return an order.

In your order confirmation email and in your account, under Orders. Otherwise, ask for it at contact@smoon-lingerie.com.

Only to process your orders, reply to you and, if you have agreed, write to you. To view or delete your data, write to contact@smoon-lingerie.com.

Privacy policy

In around 2,500 points of sale: Decathlon, Intersport, Etam, Monoprix, Manor in Switzerland, Di in Belgium, pharmacies and independent shops.

Where to find us

A Parisian brand founded in 2018 by Mathilde and Marine, the first period panties brand to be certified B Corp.

Our mission