Our model for baby beds contains 90gr./m2 fiber barrier with Quilting weaving technique. 100% LIQUID PROOF lower barrier is also available. Thanks to the 46 Wire Fabric upper surface, the baby's skin remains away from the Nylon oilcloth barrier. In order to reduce the negative effects of nylon barriers on the baby's skin, a 90gr/m2 quilted layer was used on the barrier material. However, we recommend that you do not use products containing nylon. While there are different types of liquid repellents like baby diapers, liquid proofing is not a big requirement for undershirts.