High Attenuation: Slow expansion to perfectly fit the ear canal size & from. Minimizes noise disturbance immediately Adequate sound protection: With NRR 32, user is well-protected from noisy environments. Tapered (101): Suitable for long duration use. Provides superior fit Pharma variant: Easily detectable by metal detector with PVC cord. One size fits all: No need to stock different sizes. Lowers inventory