If you want to keep your hands on your axe at all times, the GA-FC Foot Controller lets you drive Roland and BOSS amps from the floor. It allows for expansion as well: plug in optional expression pedals etc.
Boss GA-FC foot control
CH 1－CH 4 switches
CH 1－CH 4
EXP PEDAL FX jack (1/4-inch TRS phone type)
EXP PEDAL VOLUME jack (1/4-inch TRS phone type)
FOOT CONTROL jack (1/4-inch TRS phone type)
Foot Controller Cable