How often should I reapply suncream?

For incidental sun exposure the SPF provided in Murad daily moisturisers should be sufficient for the day. However for prolonged sun exposure, such as sunbathing, hiking or outdoor activities sunscreens should be reapplied more frequently. Ideally reapply every couple of hours after initial application to maintain a high SPF protection. For vacations choose a waterproof formula and always reapply after swimming, towel drying or after sports as perspiration and towel drying reduces efficacy.