Silver Impregnated Polypropylene Knitted Band Material provides better connection with operator especially for dry skin or dry environments. Additionally, silver fibers are antibacterial to help keep the band and operator clean. Superior strain relief tests in excess of 50,000,000 Cycles; over 62 times the minimum requirement per ESD S1.1 with limited lifetime warranty. Eliminates intermittent failures that occur with less durable cords extending the lifespan of the wrist strap. Contoured spring supported banana plug (US Patent# 5951337): Prevents unnecessary wear to banana spring that will lead to accidental disconnects from banana jacks. Low profile snap design: Keeps cord from being disconnected or getting in the way of operators work area. True 6' (9" of nonextended coils) coil cord allows operator to move freely within work area. 1 Megohm series resistor protect operator from accidental contact with equipment line voltage. Made in America.