Biotherm Moisturizing sun spray Waterlover Milky Sun Spray Spf50 Water and sand resistant 200ml Waterlover Milky Sun Spray offers the skin very high protection against UVA and UVB rays. Netlock technology guarantees resistance to water and sand, protecting the skin from sun damage. The Filme Ultra created is Invisible and leaves no trace of oil or stickiness on the skin. Netlock technology guarantees higher UV protection, with a higher SPF* than a conventional formula for the same filter system. The filter mesh also makes the product more resistant to water, sweat and sand. This greater resistance has a double advantage: it makes the protection more long-lasting and limits the migration of the product into the aquatic environment.