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Mon - Fri 9AM - 5PM PST

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Proof® is the premiere FDA Registered Medical Device brand in Maternity and Postpartum Support Products.

Copyright 2021 © Proof

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

Teaspoons Icon

What level is your leak?

Light

Moderate

Heavy

Super-Heavy

Shop period leaks

Proof™ provides serious protection from bladder leaks, without added bulk. 

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Moderate

Heavy

Super-Heavy

Shop bladder leaks

Discrete protection with room to accommodate your growing bump.

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Super-Light

Light

Moderate

Shop maternity

Designed with new moms in mind, leak protection without the bulk. 

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Moderate

Heavy

Super-Heavy

Shop postpartum

Go ahead, break a sweat. Our moisture-wicking fabric also reduces odor. 

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

heavy

super-heavy

Shop sweat

Undercover protection for every day of the week.

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Super-Light

Light

Shop everyday

Perfect for daily discharge, Proof™ keeps you fresh and dry.

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Super-Light

Light

Moderate

Shop discharge

For in-between days, these undies keep you spotless all day long. 

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Teaspoons Icon

What level is your leak?

Super-Light

Light

Moderate

Shop spotting
super-light Icon

Holds up to 1 Light Tampon or Panty Liner

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Great For

panty liner replacement

sweat

discharge

light spotting

odor reduction

Shop super-light
light Icon

Holds up to 1 Regular Tampon or 2 Teaspoons

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Great For

panty liner replacement

sweat

discharge

spotting

light period leaks

odor reduction

Shop light
moderate Icon

Holds up to 3 Regular Tampons or 6 Teaspoons

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Great For

moderate period leaks

sweat

light bladder leaks

replace or back up a tampon, pad, or cup

odor reduction

Shop moderate
heavy Icon

Holds up to 4 Regular Tampons or 8 Teaspoons

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Great For

moderate bladder leaks

sweat

heavy period leaks

replace a pad

replace or back up a tampon or cup

odor reduction

Shop heavy
super-heavy Icon

Holds up to 5 Regular Tampons or 10 Teaspoons

Our Patented Leak-Loc™ technology keeps you leak-free learn more

Great For

moderate bladder leaks

sweat

heavy period leaks

replace a pad

replace or back up a tampon or cup

maximum overnight period protection

odor reduction

Shop super-heavy

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"
119-127cm
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"
94-102cm
40-44"
102-112cm
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.

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.

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.

If your measurements fall into different size categories, your hip measurement will be most accurate.

Measure around your body as shown.

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.

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.

If your measurements fall into different size categories, your hip measurement will be most accurate.

Measure around your body as shown.

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.

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.

If your measurements fall into different size categories, your hip measurement will be most accurate.

Measure around your body as shown.

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.

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.

If your measurements fall into different size categories, your hip measurement will be most accurate.

Measure around your body as shown.

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.

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.

If your measurements fall into different size categories, your hip measurement will be most accurate.

sizing

Your bra measurements are the most important size when finding the perfect fit.
32
70
70
S
S
S
S
S
S
S
S
S
M
M
M
M
M
M
34
75
75
M
M
M
L
L
L
L
L
L
L
L
L
XL
XL
XL
36
80
80
S
S
S
M
M
M
M
M
M
L
L
L
L
L
L
38
85
85
M
M
M
L
L
L
L
L
L
L
L
L
XL
XL
XL
40
90
90
L
L
L
L
L
L
XL
XL
XL
XL
XL
XL
XL
XL
XL
42
95
95
XL
XL
XL
XL
XL
XL
XL
XL
XL