Two features on this pair usually cancel each other out, and here they do not. Chairs with casters normally cannot be stacked, because the wheels get in the way; chairs that stack normally have to be carried, because they have no wheels. These do both, so a pair can be rolled into position for an occasion and then stacked into a compact corner afterwards rather than left standing in the way for the rest of the week. The four casters are universal, turning in any direction, so the chairs move sideways as easily as forwards without being lifted. The backrest is mesh and curved to conform to the natural shape of the spine, which is what separates a chair someone can sit in through a long meeting from one that is merely somewhere to perch, and it stands 15.5 in high. The seat is soft padded and measures 19 by 18 in at a height of 18 in from the ground, with ventilated holes underneath so heat dissipates instead of building up over a long sitting. Underneath all of that is a reinforced metal frame carrying a rated 330 lbs, and the frame geometry is what makes the stack sit square rather than leaning. Each chair spans 23 by 22 by 32 in, the two together weigh 33 lbs, and detailed instructions make them straightforward to put together. They suit a reception area where the number of people varies from one day to the next.