Dry Bag is a kayaking term referring to a  waterproof, sealable bag that keeps contents dry.  Drybags are used by Kayak paddlers for first aid kits, snacks and other stuff they want t o bring down the river with them.
Kayaking is a watersport using a Kayak, a  small human-powered that is propelled forward using a two bladed paddle. Kyaking also means to go or travel on a body of water, usually a river and lake using a Kayak 
    
        
        
                                                            