Other design features include viscoelastic protective armor on the knuckles and reflective panels

the same crown pad can be used within sizes XS and S

The collar

and you can tailor the fit even further using the lower hem shock cord adjuster

A light and flexible back protector that fits seamlessly under an outer garment

tech zx boxer 1 YGroup_6506524 Other design features include viscoelasticAlpinestars TECH ZX Series BOXERS are constructed with LENZING FR, an innovative, sustainably produced viscose fiber that provides exceptional flame resistance and protection against heat transfer. This Formula 1 derived underwear is extremely lightweight and thin, and designed to be incredibly soft to the touch, offering greatly enhanced comfort when wearing beneath mandatory underwear layers. Certified to FIA 8856 2018 homologation standard for