How will Fourthwear™ Underwear help me after giving birth?

However you gave birth, you will need time and care as you recover.

Hospitals recommend using an ice pack to soothe the pain and discomfort associated with childbirth, but we can tell you from personal experience that it’s pretty much impossible to keep those things in place once you start moving around during your daily activities. Our patented Fourthwear™ Underwear is designed to hold an ice or heat pack anywhere in the body of the garment, so it’s perfect for assisting in recovery following all birth journeys.

How many pairs of Fourthwear™ Underwear will I need?

Unlike mesh, Fourthwear™ Underwear is non-disposable and is intentionally designed to accompany you through your postpartum recovery and beyond. Most women find that three pairs work well, so that you always have a pair on hand even on laundry days.

I’m not sure which size is right for me...

We purposefully created Fourthwear™ Underwear with grouped sizing (XXS/XS, S/M, L/XL) to make this decision easier since our bodies continue to change after giving birth. We recommend choosing the size that you’re currently wearing in maternity.

Keep in mind that the top of Fourthwear™ Underwear is not only super stretchy but can also be folded over to suit your preference.

Check out our Fit Guide here!

Can I purchase a pair for a friend?

Please do! It’s the perfect gift for anyone preparing for healing below-the-belt.

Do you carry my size?

Nyssa currently carries sizes XXS/XS, S/M, L/XL

We will add additional sizes in the near future. If you don’t see your size, please email Thank you!

How do I return or exchange a gift or purchase?

We offer free shipping on all returns. While we do not offer exchanges on Fourthwear™ , we will refund your purchase so you can re-order in you desired size. 

Contact us at to process. 

What happens to my returned item?

All returned underwear will be triple-washed and donated to soon-to-be mothers in need.

How do I wash Fourthwear™ Underwear ?

Machine wash in cool water and dry on low heat. Do not iron, do not bleach. Spot treat stains if needed. 

Where do you ship?

We ship to all 50 U.S. states. Any issues with your order? Contact us at

Do you ship internationally?

Not yet! We are just getting started, but we’re excited for Fourthwear™ Underwear and our other items to travel the globe soon!

What does the name Nyssa mean?

Nyssa means ‘new beginnings’ in Greek and is derived from the word ‘woman’ in Arabic. Our name captures our desire to support women during times of physical and emotional transformation.