Elastic

Elastic Hair Bands

• Price: negligible
• Pros: Very cheap, able to easily adjust strength by adding or removing bands
• Cons: Tend to lose elasticity quickly over time

Surgical Tubing

• Price: Ranges from 5 to 20 dollars per foot depending on thickness
• Pros: Easily attainable, fairly low cost, different thicknesses allow for different spring constants. Therefore it would be fairly straight forward to tension the band to provide the necessary force.
• Cons: Elastic tends to wear out and degrade over time, decreasing performance