Having just paid almost £20 for a pair of Halfords own brand wiper blades I think this has to be a great deal. Just in time for winter too.
Even the best blades have only a limited life before their effectiveness starts to fade. At £3.99 a pair it's cheap enough to put a fresh pair of these on without waiting until the old ones are way past it.
Sizes to suit most cars.
If your car uses two different blade sizes like mine does just buy pairs of the two different sizes and you'll have a spare set ready for next time.