they use a synthetic microfiber chassis with accordion flex zones

and the contoured forearm

with tech stretch material on the chest

The denim material of the Radium V2 tech riding pants has a thermal regulation treatment to maximize breathability and ventilation comfort on warmer days

There is also a stretch material built with Kevlar® stretch and leather backhand for optimal flexibility

a dura camo liner short RGroup_1706720 they use a synthetic microfiberAlpinestars essential go to shorts for all MTB activities, the A Dura Liner Shorts offer an added level of stretch for freedom of movement on the bike. The shorts have been engineered and constructed to provide superior durability and the ruggedness needed for the mountain biking environment. The shorts also have a secure double snap closure and side waist adjuster to personalize your fit. To store your personal belongings, the shorts have 2 zippered,