Is it advisable to buy a used helmet?

Purchasing a used helmet carries inherent risks, primarily due to uncertainty about its history and structural integrity. Helmets can suffer damage that may not be immediately visible, such as cracks or weakened materials from prior impacts. A helmet that has previously been involved in an accident might not provide adequate protection in future incidents. Additionally, without knowing how the helmet has been maintained, the effectiveness of its protective features cannot be guaranteed. Safety standards and materials used in helmet construction can also change over time, making older helmets potentially less safe, even if they appear to be in good condition. For these reasons, it is generally advised against buying used helmets to ensure maximum protection while participating in activities where head safety is critical.