Swim briefs are a polyester spandex blend with tons of stretch, quick drying and sturdy to withstand machine washing. Sublimation printing means the colors will never fade. They come with a draw string if you need to tighten the waistband that folds inside for a seamless look.
Waist sizes are shown from relaxed to stretched Ex. (30-32"), for a tighter fit choose the size with your measurement as the higher range, and for a looser fit choose the size with your measurement as the beginning range.