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