A soft brush is a type of brush with bristles that are gentle and pliable, typically made of softer materials such as natural animal hair or synthetic fibers. Soft brushes are commonly used for delicate tasks where a more gentle touch is required. They are popular in various applications, including painting, makeup application, cleaning delicate surfaces, and grooming tasks. 

Soft brushes are often used in artistic endeavors like watercolor painting or applying makeup to achieve subtle blending or smooth application. They are also suitable for cleaning electronics, dusting fragile objects, or brushing pets' fur to avoid discomfort or potential harm. The soft bristles of these brushes help prevent scratching, damaging, or causing any unnecessary agitation. With their ability to provide a gentle touch, soft brushes offer precision, control, and versatility, making them a valuable tool in a wide range of tasks that require a delicate touch.