Kayaks: Plastic or Composite?

Comparing the pros and cons of kayak materials:

Composites:

• fiberglass
• kevlar
• carbon/graphite

Pros: Durable, easy to repair, stiff, better in challenging conditions, lightweight. Good for sea kayaking. 

Cons: Expensive 

Roto-molded plastics:

• polyethylene

Pros:Low cost, higher surface tension, durable. Good for recreational kayaking. 

Cons: Heavy and susceptible to sun damage