Polyester Material: office chair neck support is made of breathable and quick-drying polyester material, ensuring comfort and hygiene. The breathable material allows for air circulation, preventing any discomfort or sweating. Angle and Height Adjustable: Neck Support for Office Chair is angle and height adjustable, providing versatility in your seating position. The adjustable design allows for a perfect fit, ensuring a comfortable and ergonomic seating experience. Punch-Free Installment: Head Rest for Office Chair is punch-free, providing convenience and easy installation. The punch-free design ensures no damage to your office chair, while 5 cm/1.97 inch adjustable thickness mounting clip ensures a secure and stable installation. Elastic Sponge: Office Chair Headrest Attachment features an elastic sponge, providing a comfortable and supportive seating experience. The elastic sponge conforms to your neck and head, ensuring a comfortable and ergonomic seating experience. Widely Used: This office chair headrest is suitable for most types and materials of chairs, computer chairs, office chairs, wooden chairs or plastic chairs. It can be easily installed and helps relieve your work fatigue and neck pain. But it is not suitable for chairs with curved backs, please make sure the back is flat before buying.