Made of lightweight polyester mesh. 32 unipolar magnets 2,000 GAUSS. Attaches to headcollar to treat the poll area (We advise you supervise your horse when using a head collar with this item). Designed to be used in the stable when your horse is at rest or whilst travelling. The neck piece has detachable fittings making it easy to secure to the magnetic rug (sold separately). It is amazingly lightweight, has fantastic cooling properties and is machine washable.