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Leakproof Cotton Boybrief - Last Call
Sale
Leakproof Cotton Boybrief - Last Call
$25.00
USD
$35.00
28% off
Absorbs about 3 super tampons
Cotton comfort
More absorbency without bulk
Machine washable
Size and Fit Guide
How to Measure
In order to select the correct sizing, we recommend you take the following measurements using a soft tape measure. If necessary, ask someone else to help.
Waist
Measure around the narrowest part of your torso, usually just above your belly button. Keep the tape snug and level, but not tight. The number where it meets is your waist measurement.
Hip
Stand with your feet together and measure around the fullest part of your hips and buttocks. Keep the tape level and snug, but not tight. The number where it meets is your hip measurement.
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Comfort-First Fit
A mid-rise boyshort with full bum coverage.
Worry-Free Protection
An innovative floating gusset provides leak protection from every angle.
Moderate Absorbency
Absorbs about 3 super tampons worth of liquid—great for moderate flow days, light bladder leaks, and sweat.
Cozy Cotton-Blend
Soft cotton with a hint of spandex feels luxurious against your skin.
OEKO-TEX® Certified
Easy to Wash
Machine washable just like regular underwear.
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How to Choose?
Essential
- • Days you don’t need leak protection. Everyday freshness and moisture wicking.
-
0 tsp
Heavy
- • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
-
about 8-14 tsp
-
about 1.5-3 regular pads
-
about 4-7 super tampons
-
about 1.5-3 menstrual cups
Light
- • Daily freshness. For sweat, discharge, period spotting, or backup protection.
-
about 1-3 tsp
-
about 1-3 pantyliners
-
about 1-3 regular tampons
-
about 0.5 menstrual cups
Moderate
- • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
-
about 4-8 tsp
-
about 1-1.5 regular pads
-
about 2-4 super tampons
-
about 0.5-3 menstrual cups
Ultra
- • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
-
about 15-20 tsp
-
about 1.5-2.5 super pads
-
about 7-11 super tampons
-
about 2-3 menstrual cups
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Total 5 star reviews: 162 Total 4 star reviews: 29 Total 3 star reviews: 27 Total 2 star reviews: 9 Total 1 star reviews: 19
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 2 weeks ago
Customers say these cotton boybrief underwear are exceptionally comfortable and soft, with many praising their all-day wearability and secure fit that doesn't ride up or roll down. Many reviews mention the cotton material feels breathable and gentle against sensitive skin. Users appreciate the leakproof protection for periods, workouts, and minor bladder leaks, with several noting they've replaced pads entirely. Common feedback includes concerns about the absorbent liner not being fully sewn in, causing it to shift or bunch up. Some mention sizing inconsistencies and wish for higher waist coverage. Despite mixed opinions on the floating gusset design, most find these underwear comfortable enough for overnight wear and daily use.
78%would recommend this product
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246 reviews
- Rated 5 out of 5 stars3 weeks agoComfortable
Awesome
Brittany M.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 3 out of 5 stars1 month agoMy favorites, but...
These are so soft & comfy. I love how they fit me but they lose stars because the pad part isn't fully stitched in so although I've not had any leaks I constantly worry about it, and the stitching up the back feels weird and is totally visible through clothing. I'm sure thee could have been a way to have them be a little more discreet.
I'm sad they've been discontinued, but hopeful that the replacement is an improvement and not a step backwards.
Sabrina K.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 1 out of 5 stars2 months agoNever received
I never received this item. I ordered it at the beginning of March, and the tracking number says “in transit”. I reached out to Knox customer service several times but received no response. I do not recommend.
Kaska W.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars2 months agoLOVE
I absolutely love my cotton boy shorts. They are super comfortable. I want one in every color!
Krissy L.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars2 months agoBetter than the new version!
I just received the new version of the cotton boybrief with a thin elastic at the waist and these are way nicer and sit better on my hips. I'm really bummed that you're phasing these out!
AdrianneVerified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars2 months agoSo comfy!
I tried them for the first time yesterday and loved them! So comfy and did not feel irritated from the material like I would with a pad! I got medium absorbency, I have lighter periods usually with one flowing day and they did well!
Brittani H.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars2 months agoCotton boybrief
My skin reacts to fabrics other than cotton so the cotton is important to me
Shirley C.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars2 months agoLove them!
It feels good to sleep not having to worry about leaking on my period. Definitely will be buying more
Jamie B.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars3 months ago5 Stars
Best undies around!
MeghanReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars3 months ago5 Stars
Love these!
MeghanReviewingLeakproof Cotton Boybrief - Last Call - Rated 3 out of 5 stars3 months agoOkay
Felt a little bulky at first compared to other brands. Like that it is boyfriend brief.
Joanne W.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call - Rated 5 out of 5 stars3 months agoI’ve had the regular briefs for years like them. I figured I’d try the boys briefs love them even better. Wish I could buy more of the boys briefs. They’re just a little too expensive for me right now.
I’m
June C.Verified BuyerReviewingLeakproof Cotton Boybrief - Last Call
