We have used Coppertone Sport Spray SPF 15  for about 6 or 8 years now.  We go to Mexico about 2 times per year and need something that keeps our Wisconsin skin from burning.  The SPF 15 is the only one that works well. The SPF 30 version is  too thick and doesnt spray on evenly, so you tend to get blotchy burned patches.  Not with the SPF 15!  My husband is bald but has hairy arms and legs and this sport spray is the PERFECT solution because its too hard to rub cream into all that hair, and the way it protects his bald head is amazing.  When we are in Mexico, with burning hot sun all day long, he will literally spray this product on once in the morning and maybe another time later in the afternoon and he gets nice and tan - no burn.   Its not always easy to find this product which is why we searched online for it and ordered several.  We always Highly Recommend this product to everyone we come across.  A good second place product is Banana Boat Sport Spray, SPF 15.