☆ Made from hypoallergenic,medical-grade polymer that's soft,comfortable enough to forget it's there ☆ For use with most coil tube audio kits, either left or right ear ☆ Stretching is good, not easily deform faded and durable ☆ Stays secure,doesn't block the ear canal,even during vigorous exercise ☆ Includes a limited lifetime warranty against defects in materials and workmanship