They are a limited edition item from the "40 Years GS Collection," which references the historical color combination of the BMW R 100 GS.  Key features Fabric: Made with ProTechWool, a high-performance fabric composed of wool and polyamide with a carbon finish. Temperature regulation: The fabric is quick-drying and temperature-regulating, making the pants suitable for warm to moderate temperatures. Protectors: The pants include NP2 protectors at the knees and hips for safety. Reinforcement: The material is reinforced in vulnerable areas to provide extra durability and protection. Ventilation: A built-in ventilation system helps with airflow. Connector zip: They feature a 40cm connector zip to attach to compatible BMW jackets. Color: The pants are gray and yellow, matching the limited edition color scheme.