Controlling Body Temperature - During summer workout, it cools down your body temperature and warms up while you are working out in cold weather. The other important function of fixgear product is that It protects from germs and deodorize. UVA/UVB protection - fixgear product protects your skin from UVA/UVB radiation during your outdoor workout. When the clothes are wet, it causes the germs to reproduce and unpleasant smell because the air cannot leave from the clothes. It will not smell stink even if you wear for long time due to our functional base layer fabric which controls the air permeability and moisture. FIXGEAR compression base-layers have 4-Way stretch compression performance, which grab your muscles tightly and provide better performance for all your activities. FIXGEAR compression base-layers are built with Flat-seam by 4-needle Feed-Off-The-Arm sewing machine and it makes your skin to feel more comfortable and softer.