It's almost like getting two shirts in one, with the roll tab sleeves that easily convert it from long sleeve to short (or at least, rolled up). And we've given it a host of other functional active features including moisture wicking fabric that moves perspiration away from the body, a mesh-lined shoulder yoke to increase breathability and UPF 30 sun protection. All together, this is a shirt that's ready to move! Cotton/polyester. Machine wash, imported.