Beginning In The 1930S, Between The Needs Of Different Types Of Work, Overall (Strap Pants) Evolved Into A Pair Of Pants With Only The Lower Half. These Pants Are Generally Used By Trainers, Miners, Smelters, Carpenters, And Other Workers. The Reason Is That Workwear Manufacturing Companies Also Want Their Products To Be Worn Daily, Without Having To Look Fully Armed Like Overalls.