Heat Moldable 37dB NRR Earplugs

Engineered for maximum passive noise reduction, these earplugs achieve a verified 37dB Noise Reduction Rating (NRR) — the benchmark for high-performance hearing protection in the UK and EU markets. Each plug measures approximately 2.5 cm in length and 1.2 cm in diameter, weighs only 4.2 g, and is constructed from skin-safe, boil-and-mould thermoplastic elastomer. Two sets of replacement tips are included: super-soft silicone and low-pressure memory foam — both hypoallergenic and washable. The heat-shaping process takes under 60 seconds: submerge in boiling water, cool slightly, then press gently into the warmed ear canal for a personalised seal. This ensures full contact and prevents slippage — critical for uninterrupted sleep or extended wear in dynamic environments. Their three-layer acoustic barrier works by combining surface damping, internal wave scattering, and core absorption — making them especially effective against broadband noise sources such as airport terminals, shared offices, live venues, and DIY projects. Lightweight, discreet, and fully reusable with no degradation in performance over time when cleaned regularly.