These teepee-shaped triangles are so simple to put on: gently twist them open, insert into your ear, then snap them closed by crossing the two pointy ends the opposite way they were originally.  The tension created from bending them open will then hold them closed.  Make sense?  If not, as soon as you get them it'll be clear.  Why, oh why hasn't anyone invented these before?  There's no catch or clasp. A little hand-hammered detail along the short end of the teepee is the only decoration.  Just elegant, minimal simplicity.