Maotaizi M8125 Cartoon Student Anti-wrist Hook Pen Holding Corrector Set Writing Posture Fixer(Blue)1. Large opening design, suitable for a variety of pen types 2. Breathable wristband, not stuffy, can be worn in all seasons 3. Widened wristband design, enhanced fixation, close fit to the wrist 4. Ergonomic design, strong fixation, anti wrist hook 5. The wristband can be adjusted to 6 levels of length, suitable for babies of different ages 6. Pacifier grade soft silicone, comfortable to hold the pen 7. Material: ABS antibacterial material + soft