Alpinestars uses CE-certified armor in the hips and knees for impact protection. This design approach helps with the pants’ light and trim feel. The Andes V2 pants that use Alpinestars’ proprietary Drystar material, floating a membrane between the outer and inner layers.
Airflow management is adjusted using zippered mesh vents on each thigh, which allows adequate cooling for most warm conditions. My one minor criticism is the zipper only functions best when standing. Trying to adjust while seated, such as waiting at a stoplight intersection, is difficult due to the mesh lining wanting to bunch and snag in the zipper.
As for the all-weather claim, I have found these pants to be comfortable in air temperatures from the high 40s to mid-80s with humidity. In semi-arid conditions, the pants are comfortable with the air temperature in the mid-90s.
Because I ride no matter the weather conditions are, short of an ice storm, I have checked these pants’ rain protection performance from light rain to heavy, driving downpours and found the protection to be adequate. The only shortcoming is if the rain is cold and falling at a moderate to heavy rate, you will feel slightly chilled in the thigh area after about 15 minutes into the ride. This is not a major limiter but can be a long-ride issue depending on a rider’s tolerance for being chilly.