This rash guard is both perfect for no gi as well as wearing underneath a gi. Please note that all rash guards fit very true to size. • 82% polyester, 18% spandex • Very soft four-way stretch fabric that stretches and recovers on the cross and lengthwise grains • UPF 50+ • Comfortable longer body and sleeves • Flat seam and coverstitch • Blank product components sourced from China