sungrubbies Women's Adventure Sun Protective Shirt (Medium (Bust 37-39), Bahamian Blue) 30+ UPF/ 96.7% UV Blocked 100% Nylon. Lightweight, moisture-wicking fabric. One inch stand-up collar. 3 button front. Underarm and torso side mesh panels for maximum air flow (You will not believe how cooling this can be:). Back vent for air cooling. One inch cuffs with button closure.