Because leather is a natural material, its absorbent and easily soaks up moisture, which can cause it to develop mold or mildew (along with a characteristic musty smell)
"If [women] are smoking more for the taste and sensory effects, then low-nicotine cigarettes might be an effective way to wean themselves off the regular cigarettes, whereas men might have more nicotine withdrawal and not really get much out of those [low-nicotine] cigarettes," Kenneth Perkins, a psychiatric professor at the University of Pittsburgh who was not involved in the study, told HuffPost
When you take all of the reasons for that fact into account, though, you may decide that adjusting to a different flavor is a small price to pay for all of the other benefits that e-cigarettes have to offer
The T206 set remained popular throughout the early 20th century, and many collectors worked to complete their collections by trading with other collectors or purchasing individual cards from dealers