BikiniBands are simply the best way to prevent tan lines. A BikiniBand holds your top securely in place so you can untie your straps and relax in the sun strap-free. 
Just slip your BikiniBand around your chest and over your top. Then, tighten your BikiniBand to securely hold your top in place and drop those straps! The discreet, translucent design allows light to shine through, keeping all areas tan line free.