1Looks like regular boxer briefs
Slim at the back and flat under trousers. Nothing rustles and nothing shows.
Pull them on0:15
Pour test1:12
Size chart
Use the waist size on your trousers. Between two sizes, go up. Sizes run S to 5XL.
| Size | Waist |
|---|---|
| S | 28 to 30 in |
| M | 31 to 33 in |
| L | 34 to 36 in |
| XL | 37 to 40 in |
| 2XL | 41 to 44 in |
| 3XL | 45 to 48 in |
| 4XL | 49 to 52 in |
| 5XL | 53 to 56 in |
Unsure about your size?Enter your height and weight and we will tell you.Use our size finder
Heavy$39.90
What makes them different
1
2Holds up to 20 fl oz
An absorbent core at the front locks in up to 20 fl oz (600 ml). Nothing comes through to your trousers.
3Machine wash cold, dry overnight
Wash them cold with your normal laundry, hang them up at night, and wear them again in the morning.
4OEKO-TEX certified fabric
The fabric is certified to OEKO-TEX Standard 100, which tests for harmful substances. Soft against your skin all day.
anything you wear.
Good under a suit.
The whole wedding, first dance included.
Good under golf pants.
Eighteen holes, no spare pads in the bag.
Good under jeans.
Four hours to your daughter's, no bag of pads on the back seat.
Good under pajamas.
Sleep through the night and wake up dry.
See what it can handle.
20 fl oz (600 ml) poured into the Heavy. Nothing on the cloth outside. Watch the test.
- Holds up to 20 fl oz
- Layer sewn in
- Machine washable
- Dry by morning
1:12
In their words
Still not sure?
Here's what our lab study found.
96%
of the test liquid locked into the absorbent layer
92%
less odor after 8 hours than plain cotton
89%
of the outer fabric still dry to the touch
About the lab study
How we tested GoodUnder, and who did it.
- Tested by
- Independent textile lab, name to come
- Accreditation
- ISO/IEC 17025 accredited lab, certificate no. to come
- When
- Date to come
- What was tested
- Number of pairs to come, Light, Moderate and Heavy, new and after 50 washes
- Method
- Test standard to come: a measured amount of test liquid poured onto the front panel, then pressure applied to see what comes through.
| Result | Score |
|---|---|
| Of the test liquid locked into the absorbent layer | 96% |
| Less odor after 8 hours than plain cotton | 92% |
| Of the outer fabric still dry to the touch | 89% |
Numbers on this page are placeholders until the study is done.
Download the full report (PDF)GoodUnder vs pads and disposables
What changes when you switch.
 | Pads | Disposable underwear | |
|---|---|---|---|
| Looks like normal underwear | Yes | No | No |
| Stays in place when you sit and walk | Yes | No | Yes |
| Quiet, nothing rustles | Yes | No | No |
| Wash and wear again | Yes | No | No |
| Cost over a year | About $150 | $300 or more | $500 or more |
Wash. Hang. Wear again.
Machine wash cold with your normal laundry, hang them up at night, and they are dry by morning.
- 1
Machine wash cold
With your normal laundry. Inside out is best.
- 2
Skip the softener and bleach
Ordinary detergent is all they need.
- 3
Hang them up
Hang them at night, waistband on the line. Dry by morning.
- 4
Wear again
Fold them into the drawer with the rest.
Fabric certified to OEKO-TEX Standard 100.
AllLightModerateHeavyWith photos
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Richard, 71Verified buyer
Oct 28, 2026
Oct 28, 2026
Forgot I had them on
Wore the Moderate for a full day out with the grandkids, lunch and a long walk in the park. Nothing came through and nobody could tell. I only remembered I had them on when I got home.
Protection: ModerateFrank, 68Verified buyer
Oct 22, 2026
Oct 22, 2026
Nothing to argue about
I would not touch disposables. These look like the boxer briefs I have worn for forty years, so there was nothing to argue about. I put them on in the morning and forget about it.
Protection: ModerateTom, 66Verified buyer
Oct 19, 2026
Oct 19, 2026
Size swap was easy
Ordered a Large, needed an XL. Texted them on a Sunday and the new pair came before I had even sent anything back. The fit is right now, snug at the waist without digging in.
Protection: LightWalter, 75Verified buyer
Oct 11, 2026
Oct 11, 2026
No spares in my pocket
First long drive in two years without a bag of pads on the back seat. Four hours to my daughter's place, one stop for coffee, and nothing showed on my trousers.
Protection: HeavyJim, 69Verified buyer
Oct 4, 2026
Oct 4, 2026
Soft and not bulky
Feels like my old boxers. Slim at the back, which I did not expect, and nothing rustles when I sit down at church. I have already ordered a second pack.
Protection: Light123
Questions
Will people be able to tell?
No. From the outside they are plain boxer briefs, slim at the back, with nothing to rustle.
How much do they hold?
Light holds up to 5 fl oz, Moderate up to 10 fl oz and Heavy up to 20 fl oz. They are made for leaks, not for a full bladder.
Which size should I get?
Use the waist size on your trousers, or tap Find my size and enter your height and weight. Between two sizes, go up. Sizes run S to 5XL.
Ordering for him?
Use the waist size on his trousers. It arrives in a plain box, and if the size is wrong we send the right one first.
How do I wash them?
Machine wash cold with your normal laundry, no fabric softener. Hang them up and they are dry by morning.
How does shipping work?
Every order ships tracked, in a plain package with only our name on it. Shipping is free on orders over $60, and $6.90 below that. We email you the tracking link.
What if they don't work for me?
Try them for 30 days. If they're not for you, we'll give you your money back.
Can I swap the size?
Yes, free. We send the new size first, then you send the old pair back.
