Special features:

1: High-quality 5 LAYERS polyurethane foam, gentle on skin, no irritation.

2: Tapered end, for added comfort, fits all different ear canals shapes and won't fall out the ear.

3: Highest 38dB SNR used from sleeping to loud noise.

4: Smooth exterior helps prevent dirt buildup .

5: Ear plugs non-toxic, Hypoallergic and Soft, Wearing for a long time, the ears will not cause pressure, pain, irritation or itching.

6: Soft & Slow rebound, Softness directly affects the comfort of wearing foam ear plugs,60's rebound time to prevent ear canal from swelling.