The male moose, called a bull, has antlers. Moose antlers are shaped like the palm of a hand with many short, pointed fingers. Bulls shed their antlers every winter, and then begin to grow new ones in the spring. A pair of moose antlers can be 5-6 feet (1.5-1.8 meters) wide and weigh as much has 85 pounds (39 kilograms).

Antlers are grown yearly by males beginning their first year; growth begins early spring and shed each winter. The antler's size is across rack spread may be 60 or more inches; a mature bull's rack may reach ove 10 feet off the ground.

Antlers have skin on them called velvet. The velvet contains blood vessels to nourish the antlers and help them grow. In early fall the velvet falls off. The moose looks messy then. To help loosen this fuzzy skin, the moose rubs his antlers against trees. Antlers can be 70 pounds.