Stay safe in the sun with all day protection from Calypso Once A Day Sun Protection SPF50 150ml. The water-resistant formula provides protection against UVA and UVB rays. Calypso Once A Day Sun Protection SPF50 only needs to be applied to the skin once and protects you for up to 8 hrs. The water-resistant formula pr s protection against UVA and UVB rays. Calypso Once A Day has a PA+++ rating and has 4 UVA stars. Protect your family all day, without having to stop the fun to reapply.