Latex-free polyurethane bands won't discolor or deteriorate. Lab-tested bands are almost three times stronger than an average rubber band of comparable size yet weighs 40 percent less. Assorted vibrant colors are ideal for color-coding. PlastiBands come in handy dispenser package.Latex-free polyurethane bands won't discolor or deteriorate. Lab-tested bands are almost three times stronger than an average rubber band of comparable size yet weighs 40 percent less. Assorted vibrant colors are ideal for color-coding. PlastiBands come in handy dispenser package.