Best friends forever and downtown party girls Jen Brill (NYC tastemaker/ex-girlfriend of Terry Richardson) and Olivia Kim (VP of Creative for Opening Ceremony) know a thing or two about what shoes to wear when dancing out at a soiree, and this year Cole Haan tapped them to spruce up their classic Chelsea shoe. On Monday, they unveiled the second installment of the collaboration, and in the holiday collection lookbook, the NYC girls generously offer some styling advice by modeling every sandal with the warm and office Christmas party-appropriate option of a black sock. It feels so correct for this time of year—these shoes will match perfectly the sparkle of the bubbles in your champagne. The Jen & Oli Holiday Collection hits stores today.