Seamless, soft and comfortable, the Women’s Smartwool Seamless Bikini Bottom is perfect for all of your outdoor activities. To keep you comfortable all day long, these bikini bottoms have an unbelievably soft Merino wool elastic waistband and interior with ventilation zones for extra breathability. So easy to wear that you may forget you’re wearing anything at all, the Smartwool Seamless Bikini Bottom has just the right amount of stretch, mobility and comfort to be your go-to underwear.