Infused with the magic of Christmas Spirit, Christmas Elves are hardy creatures.  They live long, focus driven lives devoted to preserving the Spirit of Christmas while supporting Santa Claus's enterprise.  Your Constitution score is increased by 2.

Being nimble and light on their feet, Christmas Elves have adapted to moving in the snowy and icy terrains of the North Pole and other cold climates.

Shorter legs, deal with it.

Despite having a smaller disposition in size compared to other creatures, Christmas Elves are able to create advantages in using their Small size to get through and into places larger things cannot.