Like PC processors, USB slippers it seems provide plenty of power in the single variety, keeping toes nice and toasty whilst worn at work.
For heavy-duty users however, the new and improved dual option offers much greater versatility for the wearer, with infinitely better performances when multi-tasking.
A simple upgrade allowing any frosty-footed female the same level of performance whether at the office, working from home, or even when relaxing on the sofa.
Previous issues in connection with over-heating have also been addressed, with any problems regarding prolonged usage easily rectified.