Attached is an article showing the importance of wearing the crotch strap. It may sound uncomfortable, but in reality you will barely even notice it is on.
"The deceased was near the surface with his airbag inflated and clearly visible from 100m away. He had not attached the crotch strap of his airbag. As the overburden from the slap he triggered from mid-slope overran his position in the toe of the debris, the airbag was lifted away from his back and above his head. This caused two serious problems. As the balloons and pack were pushed forward and downhill it lifted the pack, causing the chest strap to catch on his chin and impede his airway. Secondly, the buoyant airbag also pulled the victim's arms above his head, restricting movement and the ability to use hands to clear his own airway....................The space between the balloon pack and the victim's back was approximately 40-50cm."