Why boron fibre is used in body armour?

Explanation

### Step-by-Step Solution:

1. **Introduction to Boron Fiber**:
- Boron fiber is a type of synthetic fiber that is known for its unique properties, including high strength and stiffness.

2. **Properties of Boron Fiber**:
- When mixed with plastic, boron fiber creates a composite material that is significantly lighter than traditional materials like steel and aluminum.
- This composite is not only lightweight but also exhibits enhanced toughness and stiffness, making it suitable for protective gear.
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