What is the difference between a stand up paddle board and a kayak?
Stand up paddle boards and kayaks are both non-motorized water crafts. Typically a kayak is either sit on top or sit in water craft, the user paddles through the water from a seated position. Most kayaks are made from polyethylene but some kayaks are made from kevlar or fiberglass, there are also inflatable kayaks.  A stand up paddle board typically allows the user to paddle while standing up but they can also paddle while sitting if desired. Stand up paddle boards come in a variety of materials, hard paddleboards are made of fiberglass that is wrapped around a foam core, or polyethylene, inflatable paddleboards are made of stitching together pvc.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
What is the difference between a stand up paddle board and a kayak?

user
Stand up paddle boards and kayaks are both non-motorized water crafts. Typically a kayak is either sit on top or sit in water craft, the user paddles through the water from a seated position. Most kayaks are made from polyethylene but some kayaks are made from kevlar or fiberglass, there are also inflatable kayaks.  A stand up paddle board typically allows the user to paddle while standing up but they can also paddle while sitting if desired. Stand up paddle boards come in a variety of materials, hard paddleboards are made of fiberglass that is wrapped around a foam core, or polyethylene, inflatable paddleboards are made of stitching together pvc.
assistant