Key benefits Reusable and hygienic: Non-disposable design made from silicone and PU foam — washable and ready for repeated use after fully drying. Comfortable for extended wear: Slow memory rebound (about 30 seconds) reduces pressure inside the ear canal and minimizes the “pushing back” sensation. Effective multi-band noise reduction: Dual-frequency filtering and a double-layered umbrella structure reduce both high and low frequency impact on the eardrum for clearer, safer hearing protection. What it is and how it works Materials: Soft silicone combined with foamed PU (selected foamed PU material) for safe, skin-friendly contact and long-lasting resilience. Memory rebound: Approximately 30 seconds slow rebound helps the earplug conform gently to the ear canal, improving comfort and fit. Noise control: Special high- and low-frequency sound filters plus a double-layered umbrella design (CLOSED and LAMINATING) reduce harmful sound waves and smooth noisy peaks — described as delivering a "seamless drillable" noise reduction effect. Breathability: Dense, layered air holes allow airflow to keep the ear canal breathable and comfortable while maintaining noise attenuation. Practical performance and care Durable and washable: Both silicone and foam components can be rinsed with water, dried fully, and reused for a long service life. Comfortable feel: Soft texture and slow rebound reduce foreign-body sensation and ear canal discomfort during prolonged use. Safe sound attenuation: The dual-frequency filter design lessens sudden sound impacts on the eardrum without compromising comfort. Suitable uses Industrial and construction sites: Reduces impact from drills, power tools and machinery while maintaining wearer comfort for long shifts. Workshops and shooting ranges: Dual-frequency filtering lowers both high and low frequency noise for safer hearing protection. Travel, sleep, and study: Comfortable, breathable fit and washable materials make these earplugs practical for flights, noisy hotels, or focused work and rest. What to expect A washable, reusable earplug set combining silicone and foamed PU for comfort, slow-memory fit, and layered dual-frequency noise reduction using a double-layered umbrella structure (CLOSED and LAMINATING).