HUE Women's Sleepwell Solid 3/4 V-Neck T-Shirt with Temperature Regulating Technology

I always buy Hue sleepwear because it is reliably consistent in fit and quality. The 3/4 sleeve is perfect for a little more arm coverage if you get chilly like I do. If you want a roomier fit for sleeping, order a size larger, but I find my usual size S fits true to size.