Featuring the new innovative arm sleeve product ARM WAVE! It provides a transformable attach piece in the forearm area, which allow the wearer to change the original shape into a multifunctional cheering instrument. Also providing generous space in the upper arm area to ensure proper fit for all outdoor sports fun lovers, regardless of size. The arm sleeve enhanced freedom of movement and expression. Promotes product acceptance and allows sports enthusiast and fun lovers to carry out their sporting activities without constraint and with a rewarding experience.