Bag patterns built for real materials. Both are fully lined, both hold their shape when loaded, and neither is a tote that collapses the moment you put something in it. These are the patterns to use up leather, heavy canvas, cotton duck or military surplus.
The Duffel Bag is a weekender with a 19 inch top zip, a zipped side patch pocket and reinforced strap patches. The Oversized Tote Bag is a flat bottomed carry all with an internal zip pocket and a stencil placement included in the files.
Both are one size and both are marked intermediate, mostly because of the material rather than the construction. Seam allowance varies by piece, 1 cm on some seams and 2 cm on others, and it is printed on every piece.
Sewing through several layers of leather or canvas needs a different needle and a longer stitch. That is covered in seam allowance and finishing, along with why you clip instead of pin. Material weights are in choosing fabric, and the printing guide covers the A0 file, which is worth using for bag pieces this size.