TRAININGMASK Training Mask Head Strap for 2.0 and 3.0 Holds your Training Mask 2.0 higher on your head Simple Velcro makes it easy to connect or disconnect at your convenience Prevents your Training Mask 2.0 from slipping down to your neck Stops your Training Mask 2.0 from putting downward pressure on your ears Full Training Mask 2.0 sold separately