Eye-catching random color patterns on top of the highly successful Softies® design put SparkPlugs® first in line. Extra-soft foam provides a comfortable no-pressure fit. Form-fitting, tapered bullet ensures excellent attenuation. PVC-free. PlugStation® Dispenser. Corded/Cordless: Cordless; Shape: Bullet; Material(s): Foam; Noise Reduction Rate (NRR): 33 dB.. Eye-catching random color patterns on top of the highly successful Softies® design put SparkPlugs® first in line. Extra-soft foam provides a comfortable no-pressure fit. Form-fitting, tapered bullet ensures excellent attenuation. PVC-free.