SwimZip's Women Halter top is a perfect top to wear under your SwimZip UPF 50+ swim dresses and pairs great with our women's high waist bikini bottoms! With our Halter Top design, you will get maximum coverage on your chest where you receive the most sun damage. This is a vacation must-have, perfect playing with kids, or grabbing lunch. The SPF 50+ (called UPF for fabric) sun blocking material, blocks 98% of UVA and UVB rays for easy all day sun protection.