Went back to pick up another pair of slippers to send to the old man, the MUMS code is gone now but found they've listed the chestnut colour for $40 with a 20% off promo. Great for those after a more traditional Ugg colourway.
The listing is under their Men's category but they say Unisex in the description. If I remember correctly from the last deal the Men's/Women's are the same but with different sizing.
I got these the other day in black. Best decision of my life.. next to marrying my wife of course..