Alpinestars sight mercury long sleeve jerseythis sight mercury jersey from alpinestars is made from a stretchable polyester fabric a moisture wicking and quick drying fabric to keep you cool dry and comfortable with freedom of movement this long sleeve jersey has mesh panels strategically positioned under the arms for excellent ventilation and the ergonomic design allows for easy integration of elbow and back protectors featuresconstructed from stretchable poly fabricquick drying and moistur