Adjustable Arms: Offering versatility, the arms can be adjusted in height, moved up or down, and swiveled in and out to accommodate various preferences. Tilt Locks: Providing added control, the chair is equipped with tilt locks that allow users to secure the back in a fixed position, preventing unwanted reclining for a customizable seating experience. Adjustable Lumbar Pad: For personalized comfort, the Fully Loaded Aeron includes an adjustable lumbar pad that can be physically moved up and down, catering to individual ergonomic needs. In contrast, the Basic chair offers simplicity with its sole adjustment feature allowing users to adjust the seat height. The Fully Loaded version ensures a more tailored and adaptable seating experience with its additional ergonomic enhancements.