Shark is well known for making hugely flexible vacuum cleaners, and this continues through to its cordless models. As with previous Shark cordless vacuum cleaners, the IZ251UKT has Shark’s Flexology technology. This enables the wand to fold over in half, letting the vacuum stand up by itself so that you can easily wheel it into a cupboard for storage. It’s a shame the IZ251UKT isn’t able to stand up unaided when fully extended; the weight of the battery and bin tilt it over. Measuring 1180 x 260 x 245mm when fully extended, Flexology roughly cuts the height of the vacuum cleaner in two. Unlike rival, Hoover H-Free 500, you don’t have to unclip anything to get the Shark vacuum down to its compact form: simply press the button and fold.