Using a ruler, rotary cutter, and cutting mat, measure and cut rectangles from menswear fabrics. (This throw's rectangles are 4, 8, and 10 inches wide; lengths vary.) Arrange patches as desired, aligning same-width ones in rows. Pin patches together end to end as shown; sew with a 1/2-inch seam allowance to complete each row. Press seams open with iron. Pin rows together; sew with a 1/2-inch seam allowance. Press seams open.
Cut cotton flannel and shirting to size of finished quilt, with a 1/2-inch seam allowance on all sides (you may have to connect more than 1 piece to get the desired width). Layer and pin fabric pieces together: patchwork right side up, backing right side down, then flannel. Stitch around perimeter with a 1/2-inch seam allowance, leaving a 12-inch opening on 1 side. Clip corners; turn quilt right side out. Slip-stitch opening shut. Press quilt flat at edges.
With yarn and needle, make 1/4-inch tufting stitches at various intersections (keep the pattern random, not ordered). Poke needle through quilt along 1 seam, near an intersecting point; bring needle up on the other side of intersecting point. Tie a square knot; trim ends.
Assorted menswear fabrics in similar weights (such as wool, flannel, cotton velvet, and corduroy)