If you are ever in an emergency situation and cannot speak for yourself having this wallet card/key tag combo could help first responders notify your loved ones quickly. Bright red glossy front to grab their attention and emergency contact and critical medical information on the back. The key tag simply snaps off the end of the card and let's them know you have a card in your wallet with more information. Made of Teslin plastic just like your store shopper cards, Great idea for seniors, children, and every member of the family. A great compliment to go along with our Medical USB's and Life Pocket Sleeves. You can write on the back with a simple ball point pen. BE PREPARED AND PROTECTED. (Helpful hint: After writing your information on the back of the card I suggest a piece of scotch tape over the writing to prevent any smearing or smudging).