I'm not sure if these promos are from season 3 or 4 because they look like 3 but were just released now.
photo
himym
how i met your mother
barney
stinson
image
picture
promo
promotional
nph
neil patrick harris
This How I Met Your Mother photo contains
business suit, suit, suit of clothes, two piece, two piece suit, and lounge suit.
There might also be
slack suit and single breasted jacket.