Contemporary sea kayaks trace their origin to the native boats of Alaska, northern Canada, and Southwest Greenland. Eskimo hunters developed a fast sea going craft to hunt seals and walrus. The ancient Aleut name for a sea kayak is Iqyak, and earliest models were constructed from a light wooden frame (tied together with sinew or baleen) and covered with sea mammal (sea lion or seal) hides. Archaeologists have found evidence indicating that kayaks are at least 4000 years old. Wooden kayaks and fabric kayaks on wooden frames (such as the Klepper) were dominating the market up until 1950s, when fiberglass boats were first introduced. Rotomolded plastic kayaks first appeared in 1984.