The Mineral Bikini is made of TENCEL™ Lyocell fibers that are unfavorable for bacteria growth and protected with smartcel™ sensitive, a functional fiber using pharma graded zinc oxide. Together, these sustainable, soft fibers keep you fresher, longer.This design is free of front seams, with a full coverage, flattering back cut. The gusset is full coverage and free of uncomfortably placed seams, extending from above the pubic region back to mid-bum for the daily support you need.