Quoting Arthur Bagnall
Really nice! What is that helmet? And what is a sigfig?(sorry i'm new here) Please join Ken street! It has no mocs yet cus i have'nt got round to posting them yet.
Not to worry, everyone's new at some point. :)
The helmet (and torso) are from the Rebel Hoth Trooper that came with both versions of the Snowspeeder set. As for sigfigs, a sigfig is a 'Signature Minifigure' or a 'Significant Minifigure'. Just sort of your character within a theme.