Thinx Period Leggings The Thinx Period Leggings ($95), which are offered in sizes XS-4X, make exercising on your period so convenient and comfy. Because they absorb the equivalent of three tampons' worth of fluid, you might not even need to pack an extra tampon in your gym bag. Image Source: shethinx.com Thinx Period Leggings $95 from shethinx.com Buy Now