assertion skill feel feels comfortable to the skin  reason it made of natural protein fibre

You're right! The natural properties of protein fibers, such as their smooth texture, moisture absorption, breathability, and flexibility, contribute to the comfort of fabrics made from these materials.

This is the reason why:

• Assertion: Fabrics made from natural protein fibers often feel comfortable against the skin.
• Reason: This comfort is largely due to the inherent properties of the natural protein fibers themselves.

Here's why natural protein fibers contribute to comfort:

• Smooth Texture: Protein fibers like silk and wool have a smooth surface structure. This reduces friction against the skin, making the fabric feel soft and comfortable.
• Moisture Absorption: Protein fibers are excellent at absorbing moisture. This helps regulate body temperature and prevents the skin from feeling clammy or sweaty.
• Breathability: The structure of protein fibers allows for good air circulation. This breathability helps keep the body cool and comfortable, especially in warm weather.
• Flexibility: Protein fibers are naturally flexible and drape well. This allows the fabric to move with the body, providing a comfortable and unrestricted fit.

Some examples of Natural Protein Fibers include: Silk, Wool, Cashmere & Mohair etc.