Tapered designed foam uncorded ear plug for easy insertion. Resist tendency to back out of ear canal for long - term comfort. Smooth soil resistant skin prevents dirt build - up on ear plugs.New yellow and white Leight Stripe delivers high degree of comfort and visibility when worn Patented polyurethane foam expands gently in the ear canal, reduces tendency to back out of the ear canalLess expansion pressure creates a more comfortable seal, wears more comfortably than other foam earplugs over long periods of time