The main material/ Suede. Shell Ear pin material / Brass stainless steel ear pin _ Reminder- Easy to use allergies can be lightly applied to the ear pin with a small nurse or vaseline. The small isolated ear pin is in direct skin contact. Keep it in the air-tight zipper bag when you are not wearing it, reduce the chance of contact with the air. ▹ Jewelry try to avoid direct contact with sea water, perfume, hot springs, and do not take a bath!