80% Nylon, 20% Spandex Imported Elastic closure mid waist swim board shorts(a bit below belly),provide the most comfort and acceptation, high elastic waistband with insert breathable brief lining, no need other addition but provide the maxi security sense skinny on thigh, covers well the upper thighs, moderate coverage on thigh, flattering swim shorts UPF50+ sport shorts, protect the skin well(length:14.57"in US10) easy to pair with any swim tops/rash guard/quick dry top, for swimming, surf, kayaking, beach volleyball, running, yoga, hiking, any sport