About the product:1.AFFORDABLE HEARING PROTECTION - High levels of exposure to noise may result in noise-induced hearing loss. Our tested foam earplugs is one of the premium qualities in the market; it will help blocking most of the harmful external elements like NOISES and COLD ... It is recommended for WORK; FLYING; SLEEPING; RACING; SKIING...2.CERTIFIED PRODUCT - Our Earplugs are Certified and Tested. Certified by CE (European Conformity); ANSI (American National Standards Institute). Tested by PZT INSPEC; NVLAP3.QUALITY AT ITS BEST - Our earplugs is made of NON-TOXIC; DENSE; SOFT; PREMIUM PU foam; it is intended for professional as well as personal use. Its bell shape helps block most of the noises and seal the eardrums.4.EASY APPLICATION - earplugs are designed with smooth; soft; and professional grade PU foam for maximum protection; just press gently on the front and put inside the ear canal. DO NOT keep it on if you feel discomfort (readjust).