Loop's silicone hearing protection earplugs. You can choose the most suitable tip from 4 sizes (XS to L). They are washable and reusable, making them sustainable. I purchased these new on Amazon in February 2024. I used them once while sleeping, but after that, I was able to fall asleep without them, so I haven't used them since and have kept them at home. I only used the tips in the case, so the remaining three tips are unused. ◼︎Noise Reduction◼︎ SNR: 24 dB NRR: 14 dB In addition to hearing protection at live concerts, they can also be expected to improve concentration for reading, studying, and work. ◼︎Package Contents◼︎ Eco-friendly paper packaging - Loop Quiet earplugs (black) 1 set - Soft silicone ear tips in 4 sizes (XS to L) - Carrying case (white) 1 piece I plan to wrap the box in bubble wrap and ship it via Yu-Packet Post Mini.