These mesh construction chairs have a perforated back which is great news for those working in hot or humid environments or under pressure as they won't get sticky. Many styles are modern by design with a host of adjustable features to create greater comfort over extended periods of sitting. The mesh construction also has the benefit of offering support to the chair user without adding unnecessary weight to the chair. Seating design is enhanced with the addition of arms. Comfort and style combine with the addition of armrests.