【Anti-deformation Frame】The high elasticity sponge maintains its shape through prolonged use, providing longer use than cotton backs. Provides a constant cervical for periods of fitness CONVENIENT TO WEAR INSTANTLY - No complicated wearing procedures with plug-and-play functionality. Allows fast transfer in protection mode during metro rides or noon breaks BREATHABLE DESIGN - Made from high density polyester and sponge, this neck brace weighs only 55g for comfort. Breathable structure solves traditional problems of heaviness and poor ventilation, ideal for prolonged use or home use to effectively relieve neck fatigue Risk Free Physics - Features a non-heated design for potential burns, relying solely on ergonomics to correct the front head. Especially beneficial for students bent over desks or programmers who support long screen time by redistributing neck pressure DOUBLE SIZE OPTION - Available in M/L size to fit neck size 18-20 inches. This customizable fit eliminates slipping issues, making it perfect for work, study or traveling with secure yet flexible positioning