Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does what it says...

these earplugs does what it claims, isolates the noise. The sound clarity is very good with my ipod now i use only 1/10th of the volume and its clear and loud enough. It does not just boost the volume, but isolated the noise, the unique design helps it. However the user should take extra care, high volume with this phones can defiantly cause ear damage, esp. certain musics genre.However, i have a complaint, it take a couple week before you can experience the good music without pain. For the first timer, the fitting it tricky and needs experience.Surprisingly this one also delivers good bass for its size. usually it is very difficult to find a a earplug with good bass, but this one is exceptional.Pricewise might be expensive, but for the quality it is worth, look for speacial deals in amazon. you can save more.