Mocha Mousse Below-the-Belt Recovery Set - Nyssa

Mocha Mousse Essential Postpartum Kit - Nyssa

Mocha Mousse FourthWear Postpartum Recovery Underwear - Nyssa

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Mocha Mousse FourthWear Postpartum Recovery Underwear

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Color Mocha Mousse

Mocha Mousse

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Postpartum recovery just got a whole lot better — now in Mocha Mousse.

Meet the underwear that was built for exactly this moment. Nyssa's FourthWear Postpartum Recovery Underwear is the best-selling, OB-GYN recommended postpartum essential designed to support your body through vaginal delivery recovery and c-section healing — now available in our beautiful new Mocha Mousse color.

At the core of FourthWear is a patented dual-layer, 360° pocket system that holds ice or heat therapy — doctor's #1 recommended postpartum regimen — securely in place across all three zones where recovering bodies need it most:

Between the legs for targeted perineal pain relief
At the c-section incision site for scar healing and comfort
Across the lower back for postpartum back pain relief

The pocket is also designed to hold a pad on the inside of the underwear, so you can manage postpartum bleeding and apply cold or heat therapy at the same time — completely hands-free. No adjusting, no juggling, just recovery.

Crafted from super-soft, adaptive compression fabric that gently hugs the belly and moves with your changing postpartum figure, FourthWear stays smooth and seamless under clothing from your very first postpartum day through every stage of healing. Developed in collaboration with Nyssa's Innovation Advisory Board of women's wellbeing professionals — OB-GYNs, Doulas, Midwives, and Pelvic Floor Therapists — because your recovery deserves expert-backed design.

✔ FSA/HSA eligible

✔ Designed with OB-GYNs, Doulas, Midwives & Pelvic Floor Therapists

✔ Perineal recovery · C-section healing · Postpartum back pain · Postpartum bleeding support — all in one

What's Included

1ct and 3ct include underwear only.
Underwear + Ice/Heat Bundle includes 1 pair of underwear and 1 Between Legs Reusable Ice/Heat Pack.
3-Ct Underwear + Ice/Heat Bundle includes 3 pairs of underwear and 1 Between Legs Reusable Ice/Heat Pack.

Composition + Care

85% Recycled Polyester, 15% Spandex.
Machine wash cold.

Shipping

Ships in 1-2 business days.

Gift Wrapping

Tote + Note - $9

Add one of our signature totes and a handwritten gift message to your order. Please do not forget to leave your message at checkout.

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Pairs Great With...

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Mocha Mousse FourthWear Postpartum Recovery Underwear 3-set + Ice/Heat Pack

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Mocha Mousse Essential Postpartum Kit

What To Know & How It Works

FourthWear Underwear

Recommended for use with our uniquely contoured Between Legs and Uterine Reusable Ice/Heat Packs to support healing and provide relief EVERYWHERE.

Made with 4-way stretch, eco-friendly fabric that comfortably conforms to changing postpartum figures and holds ice/heat packs in place.

Mocha Mousse FourthWear Postpartum Bralette 3-set + Chest Ice/Heat Pack - Nyssa

Has a seamless ultra-high waist that can be worn over or under a pregnant or postpartum belly.

Beige high-waisted underwear with a floral pattern on a beige background

Designed with an Innovation Advisory Board of women's wellbeing professionals, including OB-GYNs, Doulas, Midwives, and Pelvic Floor Therapists.

FourthWear Underwear

Securely holds an ice or heat pack anywhere in the garment through our patented 360° pocket design.
Recommended for use with our uniquely contoured Between Legs and Uterine Reusable Ice/Heat Packs to support healing and provide relief EVERYWHERE.
Made with 4-way stretch, eco-friendly fabric that comfortably conforms to changing postpartum figures and holds ice/heat packs in place.
Has a seamless ultra-high waist that can be worn over or under a pregnant or postpartum belly.
Full-coverage seat to hold pads in place and never ride up.
Designed with an Innovation Advisory Board of women's wellbeing professionals, including OB-GYNs, Doulas, Midwives, and Pelvic Floor Therapists.

As Featured In

"Genius"

"Game-changing"

“Revolutionary”

“Nyssa is facilitating a maternal health revolution”

Mocha Mousse FourthWear Postpartum Bralette - Nyssa

Why We Love It

It's a revolution in postpartum comfort and care.

When we started Nyssa, one of the first things we wanted to tackle was the flimsy, low-functioning mesh underwear given out in hospitals. Sure, they’re free. But try wrangling a newborn while you’re wearing surgical undies that hang down to your knees under the weight of giant pads and ice packs. People who give birth deserve better. That’s why our first innovation had to be FourthWear, the world’s first luxuriously soft, eco-friendly, 4-way stretch underwear specially designed to hold an ice or heat pack in the vulva/perineal area, at the site of a caesarean incision, and everywhere else birthing people need it.

FAQs

Need support? Just ask us.

Is FourthWear Underwear for caesarean or vaginal birth recoveries?

We often don’t know exactly how our birth journey will shape up, no matter what our plans are. FourthWear Postpartum Recovery Underwear is designed specifically to provide ultimate comfort for both c-section and vaginal birth recoveries.

For vaginal recoveries, FourthWear provides a widened gusset to accommodate large postpartum pads and a comfortable high waist that can be folded down to meet the needs of changing bodies. An ice/heat pack (one of Nyssa’s specially contoured packs or one of your own) can be inserted inside the garment and placed between the legs to soothe vaginal and perineal pain, swelling, or sutures. Another pack may be placed over the abdomen or in the back to ease pain related to postpartum cramping and any other discomfort that stems from delivery.

For c-section recoveries, FourthWear provides the same functionality along with a smooth, soft fabric over the incision area. Ice/heat packs may be placed over the site of an incision to help reduce pain and discomfort and to facilitate healing of the incision area.

Is FourthWear Underwear absorbent?

Postpartum bleeding can be particularly heavy and can include discharge from the uterus, called lochia. FourthWear Underwear is not designed to be absorbent (like period underwear) but is intended to be worn with a postpartum/maternity pad (check out our Organic Cotton Extra-Long Postpartum Pads!). They are, however, leak-resistant to reduce any staining or overflow from postpartum bleeding.

Which size of FourthWear Underwear is right for me?

Figuring out the right size for your changing body might seem a daunting task. We make FourthWear Underwear with super soft, incredibly stretchy fabric that flexes and adapts to your changing figure to make it a bit easier. Whichever size you wear in maternity clothing can translate to the perfect underwear size. We recommend choosing the smaller size if you are in-between sizes. For example, if you wear a large in maternity clothing, we recommend purchasing the M/L, whereas if your maternity size is XL, then our L/XL would likely be the better fit.
Importantly, the seamless high-waist can be rolled down to maintain a tighter fit as your body changes after giving birth.

Everybody’s body is different. We all gain and lose weight throughout the birth and recovery process at different rates. For the majority of people, weight gain and loss will happen mostly in the belly region and along the hips. FourthWear Underwear is designed to change with your body; however, if a significant amount of weight is gained or lost (+80lbs), you may need to purchase an additional size.

How long should I expect to use FourthWear Underwear after giving birth?

FourthWear Underwear can be used throughout your Fourth Trimester and beyond. We specifically designed it to provide comfort and care as you continue to heal. Many people also wear it during the Third Trimester for comfort and to apply ice and heat in a variety of places (back or vulva, most commonly) to provide relief from painful pregnancy symptoms, including lower back pain, vaginal sensitivity, and cramping associated with Braxton Hicks.
Unlike other postpartum underwear, FourthWear Underwear is designed to be reusable and will last long into your postpartum recovery period and beyond.

How do I care for my FourthWear Underwear?

FourthWear Underwear can be machine washed and dried. To keep them in tip-top condition, we recommend washing on a delicate cycle with cold water and drying with low heat.

Learn More At

The Loudspeaker

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Taking Care of Yourself in Early Motherhood with Nutritional Therapist Madeleine Shaw

Benefits of Ice and Heat Therapy for Postpartum Recovery and Menstruation

Viva La Vulva: Pelvic Floor Health During Childbirth and Postpartum Recovery

Taking Care of Yourself in Early Motherhood with Nutritional Therapist Madeleine Shaw

Benefits of Ice and Heat Therapy for Postpartum Recovery and Menstruation

Viva La Vulva: Pelvic Floor Health During Childbirth and Postpartum Recovery

FourthWear Underwear FourthWear Bralette

NYSSA SIZE STD. US/CAN SIZE STD. UK/AUS SIZE

XXS/XS 00-2 2-6

XS/S 2-4 6-8

S/M 4-8 8-12

M/L 8-12 12-16

L/XL 12-16 16-20

1X/2X 18-22 22-26

2X/3X 22-28 26-32

3X4X 26-32 30-36

If you're choosing between sizes, we recommend sizing DOWN for our Postpartum Recovery Underwear. The fabric is very stretchy and adaptive.

NYSSA SIZE STD. US/UK BAND SIZE STD. US/CAN SHIRT SIZE

XXS/XS 24-26 00-2

XS/S 28-30 2-4

S/M 32-34 4-6

M/L 36-38 6-8

L/XL 38-42 8-12

1X/2X 42-46 12-16

2X/3X 46-50 16-20

3X4X 50-54 20-24

Our Postpartum Bralette fits true to size.

Feature	Nyssa FourthWear	Generic Postpartum Brands
Ice/Heat Therapy	✓ Patented therapeutic pockets	✗ Typically not available
Expert-Designed	✓ Developed with physical therapists & healthcare experts	✗ Basic functionality
Size Range	✓ XS-3XL inclusive sizing	✓ Varies by brand
Fabric Technology	✓ Premium breathable, adaptive materials	✗ Basic materials
Sustainability	✓ Eco-friendly fabrics & ethical manufacturing	✗ Typically not prioritized
Style Factor	✓ Elegant, fashion-forward design	✗ Utilitarian
Postpartum-Specific Design	✓ Engineered specifically for recovery	✓ Basic postpartum support
Comfort Guarantee	✓ 30-day comfort guarantee	✗ Standard or no guarantees