Barclays has developed a wearable device that can act as a virtual wallet and give cashless transactions a boost. Called bPay bands, they can be just swiped by the wearer over a terminal at a shop or pay point on the bus or station platform to make a purchase. The waterproof bands that can be worn all day long contain a computer chip and micro-aerial to communicate with terminals. They can also replace conventional plastic cards by allowing people to make purchases much more quickly than normal because users do not need to use a four-digit PIN. The money or information you need during the day will be integrated into a single device like bPay band from your travel card to your gym membership to the money for your coffee and lunch, a Barclays spokesman said. Barclays is now working with retailers and consumers to win acceptance of the technology.