Made of silicone material with a back adhesive sticker for easy attachment to your phone. Simply peel off the cover, press softly to secure. Fits most cards like IDs, credit cards, licenses, business cards, membership cards, insurance cards, discount cards, and can also hold items like money, charging cables, earphones, flash drives, lighters, and more. Ideal for college, university, health, fitness, trade shows, conferences, technology events, hotels, and hospitals.