We guarantee the lining is 100% leak proof.  Customers can test the lining by pouring water on the it, you will see the outer fabric remains dry and neat.  

Something you should know: This protective underwear does not replace pads or tampons and should not be use as alone product.  The leak proof capacity is for providing protection against unexpected leakage overflowed from pads or tampons.  You still need to use pads or tampons.

Care instructions: Very easy wash-off, throw into washing machine and put some detergents, viola, it's clean as new.  The waterproof lining is made of cotton lined with synthetic fibers, which could possibly be damaged by high temperature, simply machine wash cold, do not tumble dry or iron.

• LEAKPROOF PROTECTION: Mid-rise women protective underwear with frontal and extra wide rear protection to guard unexpected leakage overflowed from pads or tampons, no more mess on mattress or embarrassing stains on clothes
• RECOMMENDED FOR: Menstrual cycle heavy flow, postpartum bleeding, fecal and urinary incontinence, postnatal recovery, weak bladder control
• INSTRUCTION: Please note the cotton-blend leak proof lining is NOT for absorbency, it serves to prevent liquid going through only, MUST use with sanitary napkins, tampons, pantyliners, menstrual cups, maternity pads, incontinence pads. It also holds well for gel packs or ice packs for hemorrhoid pain relief.
• SIZE RANGE: From S up to 6XL, from petite to plus size, the number listed in the size selection refers to clothing size
• ADDED FEATURE: New style with pocket for holding extra pad to change in public discreetly

LEAKPROOF PROTECTION: Mid-rise women protective underwear with frontal and extra wide rear protection to guard unexpected leakage overflowed from pads or tampons, no more mess on mattress or embarrassing stains on clothes