Note: Please do not wear too tight, to avoid discomfort for a long time. The headband is made of soft and elastic polyester fabric, durable, not easy to deform, smooth skin feel, comfortable to wear. It can be adjusted by hook and loop strips . The headband has a non-slip design with silicone material on the forehead area, which can prevent the headband from slipping down to the eye area during wearing. Eye mask's 3D contoured shape prevents pressure on eyes while blocking light effectively, allowing natural eye movement during sleep. In order to enhance the noise reduction effect, we recommend using them together with sponge earplugs, which will significantly improve the noise reduction. We've included a storage bag to make them easy to carry around and to prevent microscopic residue from adhering to the ear cups. Earmuffs are available in both sponge and silicone for the part of the ear pads that comes into direct contact with the skin. Sponge ear pads are the same as normal earmuffs, while silicone ear pads are more comfortable. Our earmuffs have air holes to equalize air pressure and prevent damage to the eardrums caused by the air pressure generated when wearing the earmuffs. At the same time, the air holes have a little ventilation effect to avoid the ears feeling stuffy. The ear cups are designed with double-layer high-density sound-isolating cotton, which can effectively reduce low-frequency noise, but not completely isolate the noise. Our earmuffs have a significant noise reduction effect in the following scenarios: Noise from air conditioning, fan, and keyboard. Noise from the living room TV or talking. Noise from neighbors and the upper and lower floors. Animals' barking. Noise from street traffic, highway , construction sites. The sound of snoring, etc. Our earmuffs are not as comfortable as expected when sleeping on your side, with limited improvement if you can use them with a very soft pillow. Since the human ear is sensitive to the human voice, most earmuffs don't do much for the human voice. People speak at about 40-60 decibels when speaking normally and 60-90 decibels when arguing. Noise greater than 40 decibels interferes with sleep comfort, and greater than 60 decibels creates a more noticeable disturbance. ZOZZGO focuses on sleep noise reduction ear cups. Continuous efforts are only for the comfortable noise reduction of our users. ▶Question: Does it have a sound insulation effect? ▶Answer: Yes. We have measured that it effectively reduces noise by 20 - 25 decibels. If you need to enhance it, you can wear earplugs inside. When wearing it, you can hardly hear the keyboard sounds, the sounds of fans and air conditioners, the sounds of watching videos two meters away, the sounds of conversations outside upstairs and downstairs, and the square dance sounds a hundred meters away. The sounds that are efficiently reduced include the crowing and barking of chickens and dogs outside the door, snoring sounds, and the sounds of horns on the roadside. ✔Main uses: Sleeping, Studying, Working, Sound insulation and noise reduction ✔Material: ABS, Sound-absorbing sponge, PU, Silicone (for silicone model), Nylon (for elastic band). All are environmentally friendly materials and skin-friendly materials. The entire product achieves pure physical noise reduction and does not contain harmful components and metals. ✔Suggestion: By using closed noise-canceling earplugs + full-ear physical method, human voices can be isolated more effectively. ✔Special attention: For comfortable noise reduction, we have adopted an elastic band for wearing (the tightness can be adjusted and it is not easy to fall off when sleeping) and made the volume of the ear cups smaller. It is indeed slightly less effective in noise reduction than the large-sized noise insulation ear cups on the market. If you mind, please do not place an order.