At sea, not everything should get wet, and not everything should get warm. In this group you will find dry bags and waterproof backpacks for clothes, your phone and anything else that must stay dry. You will also find cool bags and coolers for food, bait and the catch.
A dry bag is closed by rolling the top down several times and fastening the buckle, which keeps spray and rain out. It is ideal in the boat for spare clothes, your phone and a first aid kit. A waterproof backpack works on the same principle but is more comfortable to carry on long walks along the shore and over rocks.
A cool bag is light and easy to carry, and it suits food and bait on shorter trips. A cooler is rigid and insulates better, so it keeps bait and catch cool through a long day. In a boat, a rigid cooler often doubles as a seat or a step, which saves space.
Choose the size to match what you carry and for how long. Add ice packs or ice before you leave and keep the cooler in the shade, and it will stay cold much longer. Keep bait and food in separate containers so smells do not mix.