What aspect of orthotic materials can be affected by environmental factors?

Flexibility and comfort of orthotic materials can be significantly influenced by environmental factors such as temperature and humidity. For instance, some materials may become more rigid or less pliable in colder conditions, while higher humidity may cause certain polymers to lose their structural integrity or flexibility. When assessing the fit and function of orthotics, it's crucial to consider how these environmental changes can impact both the performance and comfort of the device. Therefore, understanding that external conditions can alter the physical properties of orthotic materials is essential for creating effective and comfortable orthotic solutions for patients.