UNDER ARMOUR HeatGear Armour Compression Long Sleeve Mock Uses a fabric with excellent sweat-wicking, quick-drying, and stretch properties. Mesh panels are placed in areas where heat tends to build up and where ventilation is needed. The compression fit wraps the muscles, suppressing unnecessary vibrations. Under Armour's unique functional base layer supports athlete performance. Mesh material is used in the switching sections to enhance breathability. Name and number can be written on the tag on the back of the neck. HEATGEAR ARMOUR: Keeps the body cool and dry even in extreme heat with a fabric that excels in sweat-wicking, quick-drying, and stretch properties. 4-way stretch: Excellent stretch in 4 directions. Moisture control: Quickly absorbs sweat and releases it to the outside, keeping the athlete's body dry at all times. I purchased this, but I have not used it even once. There is a space to write your name on the bottom right, which can be used as a marker even if you are wearing the same item in a club or dormitory. Please refrain from purchasing if you are sensitive to items stored at home.