article_snippet.sent: Scroll down for video of the body armour in action .
article_snippet.sent: If a protective vest is fitted to the body, then a four centimeter deep deflection may cause injury to the sternum, sternum fracture, myocardial infarction, lethal damage to the spleen,' Struszczyk said. '
article_snippet.sent: Implementing the solution in body armor required designing special inserts, but body armor says those are lighter than standard ballistic inserts and broader range of movement for those users in the police and military. '
article_snippet.sent: A Bullet test shows the material hardening on impact.
article_snippet.sent: Researchers have already tested the material in existing body armour designs.
highlights_snippet.sent: Clothing can include Moratex pack which instantly hardens on impact .
  
highlights_snippet.sent: Has been shown to stop bullets in lab tests - yet wearer can move around .