Series 1000 Stacking Chairs
As in cars, leather is typically offered as an alternative when a piece requires some sort of upholstering.
White oak is the bread-and-butter material of Arts and Crafts furniture. Naturally a light tan color, it shows interesting surface patterns when quarter-sawn. It dyes and stains nicely and is often colored to an amber tone or to a darker brown, though antiques will have been fumed.