DEMIblue's rubber gloves with elastic band protect nails because they create a barrier between the nails and any potentially damaging or harsh substances. 
 
When performing tasks such as washing dishes, cleaning with chemicals, or even gardening, the nails can become brittle, discolored, or even break, rubber gloves with an elastic band prevent these substances from coming into direct contact with the nails, reducing the likelihood of damage. 
 
Additionally, the gloves can help to retain moisture and prevent the nails from drying out, which can also contribute to their overall health and appearance.