Since the strut is always exposed to road elements such as dust, water, sand, stones, such harmful elements can cause abrasive wear to the polished shaft, upper seal & bushing, you need something that can protect the strut. And that's exactly what a Strut Dust Sleeve does.
Strut Bellows, also called strut boots.The dust sleeve is a tube-like component made from hardwearing materials such as plastic or rubber or polyurethane that can protect the piston rod from damage and corrosion from dust and from various road contaminant.
A malfunctioning Strut Bellows can make your vehicle rattle and even make the driver lose control of the vehicle. If you find that your strut bellows are torn or worn out, you should replace them at the earliest to avoid subjecting your struts to corrosive elements like dust and moisture.