The pull-out hose puts less stress on the valve. And you weren't stressed to start with. It's all very well hauling a giant pump around, but all that leverage can snap a delicate valve stem right off.
The Register II takes this to the next level by bringing styling and venting of Giro's highest-end road helmets into this lightweight in-mold helmet. With a removable visor, an adjustable fit system, and Mips.