Wearing warm clothing for six years usually results in a significant decrease in its insulation performance. The insulation effect of warm clothes is related to factors such as material loss, washing method, and wearing frequency. It is recommended to replace warm clothes that have been worn for more than three years. The insulation layer of thermal clothing is mainly maintained by fiber structure, and long-term wearing and washing can cause fiber breakage and reduced fluffiness. The lifespan of warm clothing made from natural materials such as wool is about two to three years, while synthetic blended materials may last for three to five years. Frequent machine washing can accelerate fiberboard formation, while high-temperature drying can damage the insulation structure of hollow fibers. Friction during daily wear can also cause the fabric to become thinner, and easily worn areas such as armpits and elbows will lose their insulation properties first.
Some high-end thermal clothing adopts special process, such as aerogel filling or silver fiber blending, with a theoretical life of more than five years. However, in actual wear, factors such as sweat salt corrosion and detergent residue will gradually weaken functionality. Improper storage, such as long-term compression and storage, can also cause the insulation material to fail to rebound. If obvious thinning, loss of elasticity, or clumping of clothing is found, it should be replaced even if it has not been six years.
It is recommended to check the condition of warm clothes every season and wash them by hand with neutral detergent in cold water to avoid twisting and sun exposure. Keeping it dry and ventilated during storage can extend its service life. When there is obvious ventilation or the need to stack multiple layers to keep warm, it indicates that the clothing has lost its proper function and should be replaced in a timely manner to ensure the warmth effect in winter.
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