Noise cancelling technology in the WF - SP700N truly wireless and WI - SP600N in - ear headphones lets you concentrate on your training in the noisyenvironment of the gym — even with machines banging and people talking.
The ear hook design will keep them firmly seated while running; however, with only decent noise isolation, using them in a noisyenvironment like a gym may not be ideal if you are trying to tune out the world.