The Listen Technologies LA-172’s are an FDA-approved elastic secured covering for the LA-165, LA-402, LA-403 headphones and LA-452, LA-453 headsets. One-time use. • Pack of 100 coverings • White Mesh non-woven polypropylene with latex free elastic draw string • Dimensions 3 in. (7.6 cm) OØ, 1 in. (2.5 cm) IØ