The world's best period underwear... period.
We spent years meticulously designing Proof period underwear to protect you from leaks with the highest quality materials, so no drop can stop you.
60 day leak free guarantee
FREE SHIPPING on all orders OVER $50
FSA/HSA Approved
With a pair for every flow, you’ll be able to find your Proof™-perfect fit.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Proof™ provides serious protection from bladder leaks, without added bulk.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Discrete protection with room to accommodate your growing bump.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Designed with new moms in mind, leak protection without the bulk.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Go ahead, break a sweat. Our moisture-wicking fabric also reduces odor.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Undercover protection for every day of the week.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Perfect for daily discharge, Proof™ keeps you fresh and dry.
Our Patented Leak-Loc® technology keeps you leak-free learn more
For in-between days, these undies keep you spotless all day long.
Our Patented Leak-Loc® technology keeps you leak-free learn more
Holds up to 1 Light Tampon or Panty Liner
Our Patented Leak-Loc® technology keeps you leak-free learn more
Holds up to 1 Regular Tampon or 2 Teaspoons
Our Patented Leak-Loc® technology keeps you leak-free learn more
Holds up to 3 Regular Tampons or 6 Teaspoons
Our Patented Leak-Loc® technology keeps you leak-free learn more
Holds up to 4 Regular Tampons or 8 Teaspoons
Our Patented Leak-Loc® technology keeps you leak-free learn more
Holds up to 5 Regular Tampons or 10 Teaspoons
Our Patented Leak-Loc® technology keeps you leak-free learn more
underwear sizing
Your hip and waist measurements are the most important size when finding the perfect fit.
HIP
33-35"
84-89cm
35-38"
89-97cm
38-41"
97-104cm
41-44"
104-112cm
44-47"
112-119cm
47-50"
119-127"
50-54"
127-137cm"
WAIST
23-25"
58-64cm
25-28"
64-71cm
28-31"
71-79cm
31-34"
79-86cm
34-37"
86-94cm
37-40"
94-102"
40-44"
102-112"
US
0-2
0-2
4-6
4-6
8-10
8-10
12-14
12-14
16-18
16-18
20-22
20-22
24-26
24-26
AU/UK
4-6
4-6
8-10
8-10
12-14
12-14
16-18
16-18
20-22
20-22
22-24
22-24
26-28
26-28
EUR
32-34
32-34
36-38
36-38
40-42
40-42
44-46
44-46
48-50
48-50
52-54
52-54
56-58
56-58
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
