Why Sleep Environment is ImportantWe spend roughly a third of our life sleeping, and for this reason, the environment we sleep in has a pretty big impact on overall health. The air we breathe while sleeping, we breathe for a third of our day. The fabric we come in contact with during sleep, we touch for a third of our day. The mattress we sleep on, we interact with for a third of our day. The lights and sounds present during sleep, we see and hear for a third of our day.