Sea sock

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A sea sock is a piece of equipment used in sea kayaking. It is a large waterproof bag that is placed inside the kayak and attached tightly all around the rim of the cockpit. The paddler sits inside the sea sock.

A sea sock is different from a spraydeck, which keeps water out of the kayak while the kayaker is in the boat. If the kayak capsizes, the kayaker can exit the capsized kayak underwater. The spraydeck remains attached to the kayaker, but a sea sock remains with the kayak and prevents it from filling with water.

Sea socks also reduce instability caused by water sloshing around inside the boat.