An absolue 'go to' for me is a jumpsuit. I love them.
In fact this is my 'go to' a jumpsuit and a belt bag. No nothing to come undone, hands free.
The jumpsuit was created as a a one piece garment with arms and legs, covering everything barr feet, hands and head. Originally used by parachuters.
The original skydivers' jumpsuits were simple garments designed to insulate the body from the cold of high altitudes and minimize risk of covering important handles and grips.
The only down side is nipping to the bathroom - when the whole garment needs to almost come off but hey! who cares for the majority of the time this is the easiest garment to wear.