I used a smartphone strap on the back right side for about a month, but I removed it cleanly and disinfected it. Please refrain from purchasing if you are sensitive to this. ■ This slim-style hybrid case uses elastic TPU (thermoplastic polyurethane) material for the sides and a special polycarbonate material on the back that resists fingerprints. ■ The sides are protected by a TPU (thermoplastic polyurethane) frame that combines strong durability and flexibility. ■ The polycarbonate material on the back is treated with a special "Silky Clear" process that combines resistance to fingerprints with high transparency. ■ Air cushions are installed at the four corners where the impact is most likely to occur during a fall, efficiently absorbing the shock. ■ Micro-dot processing is applied to the inside of the case sides. ■ The design protects the camera lens from scratches when the device is placed on a flat surface. ■ It has a strap hole for attaching a strap. ■ *This product does not include a strap. ■ The case covers all connectors and buttons, so you can use it with peace of mind. ■ You can connect various cables, take photos, and operate buttons while the case is attached. ■ This product supports wireless charging. Price is not negotiable. Instant purchase is welcome. Thank you.