The plaid blazer ($179) in a wool viscose blend is fully-lined. Featuring a two-button closure. It would be great alone with jeans and a t-shirt or paired with the plaid pants.
These high-waisted plaid pants ($139) are nice and roomy. Also in a wool/viscose blend.
Note: I recommend ordering at least 1 size down from your normal size. These sizes run HUGE!