The endura translite sleeveless base layer can be used in any weather as the foundation for your layering system the extra fine gauge rapid wicking mesh fabric is exceptionally comfortable and offers great breathability to regulate your body temperature the antibacterial finish will keep you feeling fresher for longer this sleeveless base layer will keep you warmer on cold days but will allow your skin to breathe so you remain dryer and cooler on warmer days the athletic fit is perfect