Compact and easy to use design allows you to use it anytimeThe included knee pads help protect your joints during intense workouts.Beginners to professionals, men, women, and children. This product can be used primarily for upper body training.Instructions for training are included in the instruction manual.Approximately 5.1 inches (13 cm) rubber grip for a firm grip even with sweaty hands.The 14cm wheel with a curved surface is coated with rubber to ensure a smooth and quiet movement. By strengthening the abdomen and shoulder muscles to promote proper posture.If the spine is straight, the abdominal muscles are active and supports the discs while walking, sitting, or standing.The abdominal and back muscle balance is very important, so you can intensively train your abs and back muscles with this ab roller.In addition, when you are doing movements such as bending and lifting your waist to carry heavy objects, you can also take an important role in the tightening abdominal muscles.