Socks are more moldable than dikes or booms. The skin is constructed of a lightweight, knit material. Socks are mainly used in maintenance applications for containing and absorbing liquids. Dikes do not mold or form around equipment as well as socks, but are more durable. Dikes are used for containing and absorbing small and large spills in open areas. Booms consist of a particulate-type absorbent covered with a porous fabric. Available in various diameters and lengths, booms are used for containing and absorbing large spills.