Polyethylene does not hold up under repeated washing and drying, so, for our waterproof pads, we add polyurethane.
The total amount of polyurethane is about 2% of the product.
The polyurethane is essentially an ultra- thin layer inside the pad, just enough to make it waterproof, although it is not visible when examining the pad.
GOTS has approved our polyurethane. GOTS allows up to 5% accessories, and the allowable accessories include polyurethane (not polyurethane foam, of course). Being that our waterproof pads are 100% organic cotton, except only for the polyurethane, we are in compliance with GOTS rules.
It is made from the same grade material as is required for food contact applications, and meets the highest standards for medical device biocompatibility (USP Class VI).
It does not contain any fire retardants or antimicrobial treatments and is free of vinyl/PVC, phthalates and latex. In addition, we have tested these pads with Greenguard and there is essentially no off-gassing.It is certified to the Greenguard “Select” standard (which is their highest standard).
Naturepedic's waterproof mattress pads uses DrySleep™ technology: DrySleep™ technology, including careful design of fabric, pore size, waterproofing thickness, and other characteristics, effectively blocks liquids from passing through the fabric and contaminating the mattress below, while allowing some water vapor (similar to humidity naturally found in the air) to escape. This can help with a more comfortable sleep.
The polyurethane waterproof barrier used in DrySleep easily meets the GREENGUARD Gold chemical emissions standard. Within quality limits, it is also permitted as an additional material/accessory per the Global Organic Textile Standard (GOTS) for organic products.
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