Earplug and earbud design helps seal out wind noise and directs speaker sounds right into your ear canal for a deep bass and greater clarity. Foam ear cushions expand slowly for a comfortable custom fit and good noise isolation. The Koss Earplug Speakers are an affordable way to experiment with sound... they are just foam earplugs with quality, built-in speakers, and they’re perfect for use in places with high levels of outside noise. Affordable, comfortable, effective. Not for Riding Use because you might get in an accident if you miss any road noises. (What about cars with air conditioning, lots of sound insulation, and big stereo systems? What about those, huh?). Warning! These devices may block out ambient sounds important for safe riding. Do not use where other road users may be present. Check local laws.