Buy One // Give One: we will match every purchase with a product donation!
Postpartum Recovery|FourthWear Postpartum Underwear + Between Legs Ice/Heat Bundle

FourthWear Postpartum Underwear + Between Legs Ice/Heat Bundle

20.000 Ft

A favorite duo among new moms— one pair of our OB-GYN recommended FourthWear Postpartum Recovery Underwear and one uniquely contoured Between Legs Reusable Ice/Heat Pack in a lovely reusable pouch. FourthWear Underwear is the original dual-layered postpartum underwear with a unique 360° pocket design to securely hold ice or heat therapy between the legs, at the site of caesarean incision, and around back where postpartum recovering bodies need it most. It was thoughtfully designed in collaboration with an Innovation Advisory Board of OB-GYNs, Doulas, Midwives, and Pelvic Floor Therapists.

FSA/HSA eligible and a Professionally Referred Product. Health pros, let's talk! Click here.

Color Jet Black
Jet Black
Underwear Size
What's Included
  • One pair of FourthWear Postpartum Recovery Underwear.
  • One uniquely contoured Between Legs Reusable Ice/Heat Pack.
  • A complimentary reusable gift pouch.
Composition + Care
  • Underwear: 85% Recycled Polyester, 15% Spandex. Machine wash cold.
  • Reusable Ice/Heat Pack: Measures less than 0.5 in/1.25 cm in thickness. Store in the freezer for cooling comfort. Microwave for 15 second intervals for heat therapy. Do not machine wash. When needed, clean by rinsing in cold water with mild soap and let air dry.

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.

Add to Bag




"Nyssa is facilitating a maternal health revolution"

Woman in FourthWear Pospartum Bralette & Underwear holding baby
why we love it

It's a postpartum recovery must-have!

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 or at the site of a caesarean incision— so you can really soothe as you move into motherhood.

Learn more
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 caesarean 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 caesarean 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.
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.
When should I use ice and when should I use heat?
Ice therapy is the traditional weapon of choice for dealing with soft tissue injuries that involve swelling. Cold therapy, also called cryotherapy, reduces blood flow, which mitigates pain-causing inflammation and swelling. This makes ice a useful tool for everyday pain management and application wherever there is swelling (eg: incision site, chafed nipples). Heat, on the other hand, opens vessels to increase blood flow, making its application critical for alleviating muscle pain and removing blockages caused by clogged milk ducts.
Are the materials and cooling agents in the ice/heat pack safe?
The exterior of our ice/heat packs is made of an FDA-approved knitted plastic/fabric composite. The cooling agent is comprised of naturally derived ingredients: Glycerine, Water, and Sodium Polymer. These ingredients are all non-toxic and approved by the FDA.

Customer Reviews

Learn More At

The Loudspeaker

How Long Does it Take to Recover (Physically) After Giving Birth?
How Long Does it Take to Recover (Physically) After Giving Birth?
Read More
Navigating The Realities of New Motherhood With Doula Katy Collins
Navigating The Realities of New Motherhood With Doula Katy Collins
Read More
Benefits of Ice & Heat Therapy for Postpartum and Menstruating People
Benefits of Ice & Heat Therapy for Postpartum and Menstruating People
Read More
FourthWear Underwear FourthWear Bralette
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

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

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

Our Postpartum Bralette fits true to size.

Your Bag

Keep Shopping