The ARLO LONG SLEEVE - BLACK is one of the most comfortable long sleeve shirts I have worn. I wear It to the gym in the early mornings or evenings when it is cold. I also train in it too. It's keeps me warm and my muscles ready to go for the most energetic and intense workouts. If you haven't tried the Obsessed Gymwear Range, why not give it a go. â ď¸CAUTION IT WILL LEAVE YOU OBSESSEDâ ď¸