The principle reason dozing bare is beneficial for you comes down to this: it keeps garments from impeding your body's normal thermoregulation process.
What's thermoregulation? Since people are endotherms, our body directs our temperature both inside and because of outside boosts. For the duration of the day, your mind directs your body temperature to keep it generally around 98.6 degrees, with some variety.
One of those varieties is fixing to your rest wake cycle. Your temperature drops at night as melatonin discharges, setting you up for rest. It keeps on dropping amid your sleep until the point when it achieves its low point around 6am. At that point, to vigorously set you up to confront the day, your mind commences cortisol creation and starts raising your temperature before you wake up.
Keeping your body cool is vital to getting a charge out of a night of continuous rest. When you carry night wear in with the general mish-mash, your body has more outer variables to manage that can influence your temperature. This is particularly the case if your nightgown keep you too warm, causing awkward night sweats that meddle with your rest and wake you up.