An armrest bun. The armrest bun inserts within an armrest to provide cushioning. The armrest bun includes a support substrate and a poured foam layer. The bun inserting within a cavity of the armrest. The foam layer shaped to match the armrest cavity to limit dead-spots. The bun can be manufactured by position a support substrate in a pouring tool. Foam is poured into a cavity of the pouring tool. The poured foam solidifies to bond to the support substrate. The bun can then be inserted into the armrest.