Chemical degradation of organic UV filters upon solar exposure reduces photoprotective efficacy over time. Preventing this degradation ensures consistent SPF performance and prevents the formation of reactive byproducts on the skin.

UV protection efficacy drops significantly when applied to or exposed to water. Improving retention on wet surfaces ensures consistent photoprotection during active use.

Skin surfaces naturally attract and retain abrasive or harmful external particles like sand and high-energy visible light. Reducing this physical and radiative interaction prevents skin irritation and photo-induced damage.

UV filters like dibenzoylmethanes leave persistent yellow marks on fabrics upon contact. Preventing this aesthetic degradation increases consumer compliance and product commercial viability.