"The Patented Delta System -
Petzl's has introduced a distinctive and innovative new leg-loop design, the Delta System. The lower edge of each leg loop is circular, while the upper edge is oval with a tensioned contour that creates an even weight distribution across the entire area of contact with the thighs. This unique ergonomic design not only enhances comfort by ensuring even pressure, but also improves freedom of movement through a better fit.
Patented Double Back Buckles-
Incredibly easy to adjust, the Double-Back buckles offer an extra margin of safety over traditional buckles because they don't require back threading -- a feature really appreciated by climbing- and ropes-course instructors or by anyone who might inadvertently forget to back-thread a regular buckle.
Fast Forward gear loops-
Designed for quick and easy access, these sturdy molded nylon gear loops stand clear of the harness and use gravity to keep gear and draws within easy reach.
Twin-Air Waist Belt-
A wide, comfortable belt, designed with two supportive strips of padded webbing, offers, great support with maximum ventilation and minimum weight.
New Micro-vent Padding-
Developed expressly for Petzl, Micro-vent padding combines a highly ventilated foam and special breathable laminates offering unrivaled support, durability, and breathability"