1. Performance is a top priority and we only use smart, lightweight materials to create a product that fits comfortably around the torso without holding you back. Our focus is to minimise disruption to any functional movement while giving you practical and almost seamless access to what you need when you need it2. Balance - Did you know that uneven weight distribution can lead to injury? Now you can distribute the desired items evenly across your torso for optimal balance without hindering your progress or altering your technique.3. PRACTICAL - Comes with an adjustable waistband for your choice of fit; a highly reflective print for your night runs; your mobile device is in a central and natural position. You can now use the quick release and hinge to access your device on the move: change songs, check progress and even take calls while training.4. Cell Phone and Size - This bag fits 99% of modern cell phones. We designed one to fit most 28" - 48" busts. Its materials allow the running vest to expand generously and shape to individual body shape, while providing a comfortable and supportive fit. The material may feel tight at first, but loosen a little after 2-3 sessions.