The kayak ("qayaq" sg "qayak" dual "qayat" pl in Yup'ik and Cup'ik, "qayar ~ qay'ar" sg "qay'ag" dual "qay'at ~ qass'it" pl in Cup'ig; from "qai-" "surface; top")) is small narrow closed skin-covered boat and was first used by the native speakers of the Eskimo–Aleut languages. The Yup'ik used kayaks for seal hunting, fishing, and general transportation. The Yup'ik people considered a kayak the owner's most prized possession. Traditionally, a kayak was a Yup'ik hunter's most prized possession and a symbol of manhood. It is fast and maneuverable, seaworthy, light, and strong. Kayak is made of driftwood from the beach, covered with the skin of a sea mammal, and sewn with sinew from another animal. Yup'ik kayaks are known from the earliest ethnographic reports, but there are currently no surviving full-size Yup'ik kayaks from the pre-contact period. The Yup'ik Norton Sound/Hooper Bay kayaks consisted of 5–6 young seal skins stretched for the covering. The Yup'ik style of seams contains a running stitch partially piercing the skin on top and an overlapping stitch on the inside with a grass insert. Caninermiut style Yup'ik kayak used in the Kwigillingok and Kipnuk regions and there are teeth marks in the wood of the circular hatch opening, made by the builders as they bent and curved the driftwood into shape.