I always have trouble keep earphone in while run , which be why I like the behind the neack type . I have a pair of Sony mdr-as50g which be fine , but I never really like the puck-shaped storage case and the right side stop work and only the left ear have sound . these Philips be awesome , though . they be tight , light , and take no time to put on and get set to run . they stay in\/on very well . almost too well , they really block out other sound . the sound be good , but not great . but they be waterproof and can be easily rinse off . pro : Stay in with zero problem light weight quick to put on with no fuss waterproof durable -lrb- so far -rrb- good sound better than Sony mdr-as50g -lrb- my opinion -rrb- prefer simple mesh storage pouch to Sony 's plastic case con : not great sound block -lrb- maybe -rrb- too much sound