Frequently asked questions

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Using duets™
What makes duets™ different from other period products on the market?

MOONS duets™ is a uniquely designed Tandem Protection System that uses both a compact tampon and a slim liner to prevent leaks and stains during your monthly moon, or period. A first of its kind product, duets™ offers ultimate protection and convenience.

duets™ includes:
• a capsule tampon available in one of two protection levels, made with a comfort core and side-to-side expansion that stops leaks before they can happen.
• a slim, super-absorbent liner for backup protection as well as freshness and comfort.
• individually wrapped products so you can use them together as a system or separately, as your flow requires.

How often should I change my duets™?

The capsule tampons in duets™ usually last 4-8 hours, but should never be used longer than 8 hours. You can wear a tampon overnight, but it's best to put a new tampon in right before going to bed and to replace it soon after you wake up in the morning.

The slim liner in duets™ can be worn longer, but we recommend changing it at the same time as the tampon, for ultimate protection and freshness.

Do I have to use the tampon and liner together?

MOONS duets™ provides the best protection when used together.  The capsule tampon and slim liner work best in tandem to stop leaks from happening. But of course, use what you need when you need it as your flow dictates.

What is a capsule tampon and how should I use it?

Our capsule tampon works similarly to other compact tampons you may have used in the past, and offers the same protection as a full size tampon. The difference is that it's small enough to fit in your hand or pocket, because the tampon is placed in a smaller, extendable applicator.

To use, pull on the plastic applicator stem to snap it into place. The rounded tip should be toward you and the string should hang down. Holding the applicator with your thumb and middle finger, put the tip of the applicator into the vaginal opening and gently push it into your vagina. While holding the applicator, push the smaller tube all the way into the larger tube. This will release the tampon. Once you gently remove the applicator, the tampon should be comfortably inside you, with the string hanging outside of your body.

Now, you can place the applicator back into the wrapper and dispose of it in the waste bin. Never flush the applicator or the tampon.

What is a slim liner and how should I use it?

The duets™ liner is meant to give you the strongest protection when paired with the capsule tampon. Thin, flexible, and ultra-absorbent, it provides comfortable back-up coverage. The duets™ liner has edge-to-edge adhesive to securely keep it in place, and comes individually wrapped for ultimate portability. It is designed to be used with any style of underwear. Just remove the paper backing and place the liner in your underwear so that it sticks to the fabric and the soft cotton side is toward your body.

How do I know which duets™ is right for my flow?

The tampons in duets™ come in Regular and Super absorbencies. These are based on a standardized measure of how much fluid they can hold. The Regular tampons hold 6-9 grams of fluid, and the Super tampons hold 9-12 grams. A MOONS duets™ capsule tampon usually lasts 4-8 hours, but should never be worn for longer than 8 hours. It's always safest to use the lowest absorbency that will manage your flow. If your flow varies throughout your moon, consider our mixed duets™ box of 8 Regular and 8 Super tampons.

What should I know about TSS (Toxic Shock Syndrome)?

Although rare, TSS is a serious and sometimes fatal illness that has been associated with tampon use. A result of toxins created by the Staphylococcus aureus (staph) bacteria, TSS can occur in men, women, and children, but most frequently occurs in menstruators, particularly those 30 and younger. The FDA has estimated an annual incidence rate of 1-17 cases per 100,000 menstruators. TSS is treatable, but can also be fatal, so it is important to recognize symptoms early and to seek treatment from your doctor.

TSS warning signs can resemble flu symptoms. Pay special attention to:
• Sudden high fever (102°F or more) with or without chills
• Vomiting, diarrhea
• Fainting, dizziness
• Muscle aches or sunburn-like rash, which can progress rapidly from flu-like symptoms to a fatal illness

Don’t forget:
• Use tampons only during menstruation
• Replace the used tampon with a new one every 4-8 hours
• Use the lowest absorbency tampon that meets the needs of your moon
• You can wear a tampon overnight for up to 8 hours, but it’s best to put a new tampon in right before you go to bed and to replace it immediately after you’ve woken up in the morning
• Be sure to remove the last tampon you use at the end of your moon

If you are concerned about or are experiencing any of these symptoms during tampon use, remove your tampon and contact your doctor. If you’ve experienced TSS in the past, please consult your doctor before using duets™.

To reduce your risk of TSS, consider alternating your tampon use with pads, or if your flow allows, the liner in your duets™.

For more information or to ask the MOONS team a question, please reach out to

Ingredients & Product Details
Are your tampons and liners free of dyes, bleach, and toxins?

There are no dyes, bleach, or toxins in duets™ tampons or liners. Since tampons are considered a medical device by the Food and Drug Administration (FDA), our products and ingredients are guaranteed to meet strict safety standards.

Are your tampons made with organic cotton?

We do not use organic cotton, as it has been shown that natural cotton is just as safe and effective as organic.

The absorbent material in our tampons is purified rayon, which is derived from purified natural wood pulp then processed into absorbent cellulose fiber. It is free of elemental chlorine bleaching and perfume.

What are your tampons and applicators made of?

Our tampons are primarily made of the absorbent ingredient purified rayon, which is derived from natural wood pulp then processed into absorbent cellulose fiber. It is free of elemental chlorine bleaching and perfume. The thin fabric around the tampon core is made of polyethylene, polypropylene, or polyester for strength so it doesn't break or tear during use or removal. The applicator is made of plastic with pigments for color.

What are your liners made of?

The topsheet (the soft fabric that is designed to pull fluid away from your skin) and the backsheet (the layer that keeps the fluid inside and away from your clothes) are made of polyolefins which are commonly used in clothing fabrics. 

The absorbent core (the layer that collects and stores fluid, locking it away) contains a superabsorbent polymer (for superior absorption to prevent leaks) and wood-based cellulose. The edge-to-edge adhesive that helps the liner stick to your underwear is made of an adhesive that is similar to craft glues.

Can I flush the liner in the toilet?

No, the liner, along with the tampon and its applicator, should only be disposed of in the waste bin. It is not flushable.

Purchases & Shipping
What are my options for purchasing duets™?

There are three options to buy MOONS duets™.
1. Buy Now: Buy as many boxes of duets™ whenever you wish to. Shipping will be added to the final cost.
2. Monthly Subscription: Sign up for monthly delivery and we'll cover the cost of shipping.
3. Annual Subscription: Get free shipping and a discount when you pay for a year's supply of duets™ upfront. Simply choose if you want quarterly or semi-annual delivery.

I entered the wrong address for shipment. How can I update this?

Please get in touch with us as soon as you realize it's incorrect. Email us at or call/text us at (929) 265-7875.


How quickly after I place an order can I expect to receive my duets™?

For orders made now, deliveries will begin April 2021!

Then, once pre-sales are over, product shipments will be out in the mail within 48 hours of ordering.

May I ship duets™ to multiple addresses?

Yes, but for now, you'd have to place multiple orders. But with every order, delivery addresses will be saved in your User Account for easy access in the future. For more assistance, please reach out to us at or call/text us at (929) 265-7875


How can I track my order?

Once you have completed your order and we have prepared it for shipping, you will receive an email notification that includes your tracking number within. You can also check "My Orders" in your User Account.

What if I think my order has been lost?

You can reach out to us at and we will be happy to assist in tracking your order.

Where do you ship?

At this time, we ship everywhere within the U.S.

Subscriptions & Account Details
I forgot my account password. Now what?

No worries! When you try to log in, just click the Forgot My Password button and we'll send you a Reset Password email.

Can I adjust my duets™ subscription?

You can adjust subscription details (such as your card on file, delivery address or preferred duets™ absorbency level) at any time, as long as it is at least seven days before your next scheduled ship date
Just go to "Manage My Subscriptions" in your User Account.

How do I cancel my duets™ subscription?

We’re sorry to see you go! Please reach out to if there's anything we can do to help.
If you do want to cancel, go to "Manage Subscriptions" in your User Account. You can cancel at any time, as long as it is at least seven days before your next scheduled ship date.

How do I update information in my account?

Log in to your User Account and navigate to "Manage Subscriptions" then click the particular item you want to change and hit Edit.

What is your policy on product returns or exchanges?

Due to the nature of this product, we cannot accept returns on duets™, but please reach out with any concerns. Email us at hello@ourmoons or call/text us at (929) 265-7875

What if I receive the wrong item in my order?

Please reach out to and we will happily help resolve the issue.

How will I be billed for my duets™ subscription?

For our monthly subscription, you will be charged on the day you place your order and every month thereafter on that day.

For our annual subscription, you will be charged the complete annual fee on the day of your order and will be subsequently charged on that same date every year thereafter.

We will email you 3 days before your upcoming charge

Gifting & Coupons
Can I purchase a MOONS gift card?

Not at this time, but stay tuned! We can't wait for you to be able to give the gift of a better cycle!

Can I add a gift message to my order?

So sorry! We don't yet have the ability to include a personal note in orders.

I received a discount or coupon code, how does that work?

You may apply your coupon code at check out. There will be a field in which you can enter the discount code.
Please note: codes may not be used together (i.e. no stacking) and may be applied to individual orders or the first month of a monthly subscription, but not to an annual subscription.