Focus on seat height relative to your table. Ensure there is enough room for legs and that the style matches your decor.
Mesh offers breathability for long hours, while leather/faux leather provides a premium look but can be less breathable. Check for high-density foam that won't flatten quickly.
To avoid the "hunk of junk" scenario where a chair looks great but hurts your back, use this checklist from The Sleep Company and other experts: