Durable, lightweight fabric. Some users prefer the softness, comfort and flexibility of this material. Has silver impregnated polypropylene knitted on inside for superior conductivity. Reliably removes generated static charges. Made with pure silver irreversibly bound to fibers providing both antimicrobial and anti-odor performance. Adjustable, only one item to stock, may be fitted to almost all people. Locking clasp, band locked so it will not slip. Unique patented adjustment design eliminates exposed conductive "tail". - This band provides added safety eliminating chance of providing inappropriate ground path. Medical grade 300 series stainless steel used for all metal parts. Eliminates allergic skin reaction for most people. Non-shedding, non-sloughing band material, safe for microelectronics. 1 megohm series resistor to protect operator from accidental contact with equipment line voltage. UL listed. Independent review of the adequacy of the product's design. Date coded providing lot tractability to ensure quality control.