Our innovative fabric is extremely fast-drying which of course is a big plus when you're at the beach. Instead of changing into a new bikini after a swim, you can use the same one. Like all Sunkini products the bikini let extra sunshine trough to get you a more even tan. They protect your skin with a sunscreen factor of 16 to 20. The bikini have two protective layers of fabric, and you can always remove the inner fabric to let more sunshine through. This would reduce the sunscreen factor to around 8 to 10. They are not transparent, they only let extra sunshine through. Remember that the elastic lining doesn't let through any sunlight, therefore it's good to move them around a bit while you're tanning.