https://www.planetfigure.com/threads/gsm-mott-corporal-scots-guards-200mm.94275/That picture of the Drum Major marching outdoors shows perfectly why the Bearskin rarely looks right on larger scale models, it has masses of volume but no density and no real texture
There is also a debate to be had on whether a Guard Bearskin is really appropriate headgear for the US Military
Historically the bearskin cap was worn by grenadiers of several nationalities. Although the Brigade of Guards are best known for wearing the bearskin, there are several regiments within the UK and in other countries which still wear it.
Mike