Each seat post employs 24 individual plies of carbon pre impregnated with a highly toughened epoxy resin system designed to ensure a safe and rugged unit the bulk of the laminate comprises unidirectional t700 fibre the highest strength standard modulus fibre available unidirectional fibres provide the maximum tensile strength and stiffness with minimum weight this is combined with strategically positioned plies of 3k twill woven fabric adding hoop strength to resist clamping forces a