SparkPlugs Disposable Foam Earplug Pairs are made of extra-soft, low-pressure foam for a comfortable fit. Tapered shape allows easy insertion and removal and even fits in very small ear canals. Smooth surface is nonirritating. They are 100 percent PVC-free for a greener alternative. Dispenser easily dispenses earplugs.SparkPlugs Disposable Foam Earplug Pairs are made of extra-soft, low-pressure foam for a comfortable fit. Tapered shape allows easy insertion and removal and even fits in very small ear canals. Smooth surface is nonirritating. They are 100 percent PVC-free for a greener alternative. Dispenser easily dispenses earplugs.