German scientists have developed a smart fabric that remains soft and flexible during normal use — but instantly hardens on impact, becoming strong enough to stop bullets or sharp objects in a split second. • The fabric uses shear-thickening fluid or reactive polymers. • Soft and comfortable under normal conditions. • Instantly stiffens when struck or hit at high speed. • Provides protection without heavy armor or rigid plates. • Ideal for military, law enforcement, and personal safety gear. • M

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