page_title: Bikini
section_title: Bikini tan
hierarchical_section_title: Bikini / Bikini tan
caption_attribution_description: English: Tan lines on human female chest (265/365).
context_page_description: A bikini is typically a women's two-piece swimsuit featuring two triangles of fabric on top that cover the woman's breasts, similar to a bra, and two triangles of fabric on the bottom: the front covering the pelvis but exposing the navel, and the back covering the buttocks. The size of the top and bottom can vary, from bikinis that offer full coverage of the breasts, pelvis, and buttocks, to more revealing designs with a thong or G-string bottom that covers only the mons pubis, but exposes the buttocks, and a top that covers little more than the areolae.
  In May 1946, Parisian fashion designer Jacques Heim released a two-piece swimsuit design that he named the Atome and advertised as "the smallest swimsuit in the world". Like swimsuits of the era, it covered the wearer's navel, and it failed to attract much attention. Clothing designer Louis Réard introduced his new, smaller design in July. He named the swimsuit after the Bikini Atoll, where the first public test of a nuclear bomb had taken place only four days before. His skimpy design was risqué, exposing the wearer's navel and much of her buttocks.
context_section_description: The tan lines created by the wearing of a bikini while tanning are known as a bikini tan. These tan lines separate pale breasts, crotch, and buttocks from otherwise tanned skin. Prominent bikini tan lines were popular In the 1990s, and a spa in Brazil started offering perfect bikini tan lines using masking tapes in 2016.
  As bikinis leave most of the body exposed to potentially dangerous UV radiation, overexposure can cause sunburn, skin cancer, as well as other acute and chronic health effects on the skin, eyes, and immune system. As a result, medical organizations recommend that bikini wearers protect themselves from UV radiation by using broad-spectrum sunscreen, which has been shown to protect against sunburn, skin cancer, wrinkling and sagging skin. Certain sunscreen ingredients can cause harm if they penetrate the skin over time.
  A 1969 innovation of tan-through swimwear uses fabric which is perforated with thousands of micro holes that are nearly invisible to the naked eye, but which let enough sunlight through to produce a line-free tan.
caption: Tan lines created by a bikini
exif: {"Image ImageWidth": "2171", "Image ImageLength": "1355", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image Make": "NIKON CORPORATION", "Image Model": "NIKON D70s", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS5 Windows", "Image DateTime": "2013:07:18 16:59:32", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "296", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1062", "Thumbnail JPEGInterchangeFormatLength": "2870", "EXIF ExposureTime": "1/50", "EXIF FNumber": "11/5", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2009:08:04 18:52:02", "EXIF DateTimeDigitized": "2009:08:04 18:52:02", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "4", "EXIF ShutterSpeedValue": "352741/62500", "EXIF ApertureValue": "2275007/1000000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "8747/5713", "EXIF SubjectDistance": "119/100", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Tungsten (incandescent light)", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "50", "EXIF SubSecTime": "00", "EXIF SubSecTimeOriginal": "00", "EXIF SubSecTimeDigitized": "00", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2133", "EXIF ExifImageLength": "1318", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CVAPattern": "[0, 2, 0, 2, 2, 1, 1, 0]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Manual", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "75", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "None", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}