The swim diaper is a result of an extensive and rigorous research program. The external tissue is of a common swimsuit micro fibre type: 80% polyamide and 20% elastane Lycra labeled. The lining is a high tech product with two unlike sides. Protection from the solar radiation, UPF 50+ , certified Oeko-Tex. The swim diaper is sanitized clariant, treated to resist bacteria and dust mite, it has been waterproofed, made no allergic.