"In Stock" means this item is ready to ship. Orders placed before 3pm EST using a ship speed of 1 Day, 2 Days, or 3 Days will ship SAME DAY. Orders using 4-6 Day ship speed will ship within one business day.
"Ship Date" means we will special-order the product for you, and this is the date we expect your shipment to leave our warehouse.
"Oversized" means the item is large and can only be shipped using 4-6 Day ship speed. Additional shipping charges may apply.
"Freight" means the item is too large for standard shipping methods, and must be shipped by truck freight for an additional fee. Someone must be present to inspect, sign, and accept delivery, so we will call you to schedule delivery.
If you have any questions, please call 844-833-6921
Rated 5 out of
5 by
Megan F. from
So worth it!I'm a converted period disc user - much easier financially, comfortable, and so much less waste. That being said, I decided to take the plunge and get some period undies so I could finally ditch disposable period products completely - and these did not disappoint!
I live on an island that gets hot and miserable during the summer, so I was worried about there feeling like a swamp was in my pants - but these are so dang comfortable and breathable!! I'd almost prefer these over my regular everyday undies!
They may be pricey at first glance, but you end up saving so much in the end by cutting out pads/panty liners/tampons that its 100% with it! I'm already ready for more!!
Date published: 2022-02-09
Rated 5 out of
5 by
Rose K. from
From Commando to Proof at 60[This review was collected as part of a promotion.] Unlike my girlfriends who've had children, I never had a problem with a little leak here and there. I don't like anything that clings or rides up so I always went commando. Unfortunately I got in a car wreck over a year ago and seriously injured my back. Now, when I cough or sneeze, I need a little help. My Proof thongs are just what I was looking for. They feel like a second skin; they don't cling or ride up, and, not a panty line in sight. It's just like I'm going commando but I no longer worry about my dress blowing up in a gust of wind!!!
Date published: 2023-03-08
Rated 2 out of
5 by
Sunnie L. from
Hated the fit[This review was collected as part of a promotion.] Two stars for absorbency, they’re great and well made in that regard. But the fit is AWFUL. I don’t know how anyone is wearing these comfortably. They’re not very stretchy so they don’t ‘hug’ the body well and the crotch part kind of… hangs loose? And it’s not that they’re too big I actually ordered below my usual size. The rise is also a nightmare, they hit right below my belly pooch but then come up weirdly high in the back. Would still try Proof again but only if they created something high rise with more stretch.
Date published: 2022-08-18
Rated 5 out of
5 by
Leah Z. from
My Coachella LifesaverWhat a lifesaver this leakproof nude thong is - I packed 3 days of outfits in light/white bottoms for Coachella and then my heart sank when I realized my period was going to come any day that weekend. Even with tampons I leak on my first days, so ordering 3 of these nude thongs SAVED me! I was able to still wear all 3 outfits without the worry of staining my clothes, and they stayed dry when (sure enough) I did start to leak on day 2 . Could not recommend this thong enough-especially as a summer staple when basically every outfit calls for no-show nude underwear!
Date published: 2022-05-06
Rated 4 out of
5 by
Diana C. from
Leakproof Thong purchased for workouts[This review was collected as part of a promotion.] Such nice, comfortable material, not too thick in the crotch. Not hot at all for working out. I do find they run a bit big. I ordered according to my measurements and used the provided sizing chart, but I really wish I had ordered a size smaller. The recommended size is not as snug as I like for under my spandex workout clothing. The hips are wider than expected and the crotch is wider than I need, so the underwear do bunch up some. I am hoping a size smaller next time will fit in these areas better. I do love the confidence I feel that I can jump, run, jog and not have to change my clothing immediately. They are so nice! I will definitely buy again and size down one size for under fitted spandex.
Date published: 2022-09-15
Rated 4 out of
5 by
Danielle from
Very comfortable! And do the job[This review was collected as part of a promotion.] I love the material, they are very comfortable and do the job! I have HSV-2. So my area is very sensitive to liners, it doesn’t appreciate the friction and irritation they can cause. When excessive irritation occurs that’s when I will get an outbreak, unfortunately. I finally decided to invest in these underwear and see what they were all about! I am so happy I did:) they do the job very well and are not super thick and are comfortable for all day wear. I wore them to work for 13hrs (I’m a nurse) and they were great. I gave them a 4 star because I wish there were different options like high rise option. I don’t like low or mid rise underwear for leggings or jeans because you can see the indentation of the underwear.
Date published: 2021-11-01
Rated 5 out of
5 by
Maggie H. from
Favorite period underwear[This review was collected as part of a promotion.] Proof, and specifically these thongs, are my favorite period underwear of all time. I’ve tried Thinx and another company (I totally forgot which one) and proof is 100% the most comfortable. When I’m on my period I also have to wear a tampon with these, but I like using them to feel more confident that I’m not bleeding through anything. I also wear them as daily underwear since I’ve had two kids... they just make me feel a little more safe and dry. Love them!!
Date published: 2023-05-25
Rated 5 out of
5 by
Cindy from
OMG! I am so excited to find these!My new favorite panties! I have polycystic ovary syndrome and my periods are extremely erratic. As a result, on the days I get my period unexpectedly, I often find myself leaking through my underwear. I have tried a couple other brands, but they are so bulky and uncomfortable and most times end up leaking anyway. Proof is different because they are so thin and comfortable, that I want to wear them everyday... and they WORK! I feel really confident putting on my white jeans now!
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Size Guide
Proof Women's Underwear
SIZE
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
Hips
33 - 35"
35 - 38"
38 - 41"
41 - 44"
44 - 47"
47 - 50"
50 - 54"
Waist
23 - 25"
25 - 28"
28 - 31"
31 - 34"
34 - 37"
37 - 40"
40 - 44"
US Numeric Size
0 - 2
4 - 6
8 - 10
12 - 14
16 - 18
20 - 22
24 - 26
AU/UK Numeric Size
4 - 6
8 - 10
12 - 14
16 - 18
20 - 22
24 - 26
26 - 28
EUR Numeric Size
32 - 34
36 - 38
40 - 42
44 - 46
48 - 50
52 - 54
56 - 58
HOW to MEASURE WAIST: Find your waist measure by leaning over to one side. Where your body naturally creases is your where you will place the tape. Measure parallel to the ground.
HIP: For your hip measurement, turn to the side and locate the fullest part of your booty. Place the tape around your body, parallel to the floor, around the widest and fullest part of your hips and tush.
NOTE: If your measurements fall into different size categories, your hip measurement will be most accurate.