small scrap of heavy interfacing - Pellon Peltex 71F
Merchant & Mills also has recommendations
as well as options for either a zippered or zipper-free back
From the experts in oilskin
Aurifil Says this about their 50wt thread
Aurifil Thread - 50wt 100% cotton - colour 2800 Pale Green Book small scrap of heavy interfacingAurifil Says this about their 50wt thread. The 50wt is strong and thin, and results in remarkably flat and crisp seams. While it is wonderful for piecing, subtle quilting & topstitching, and English Paper Piecing it also works incredibly well for Needle Turn Applique, Bobbin and Machine Lace, Machine Applique (Straight Stitch, ZigZag, Blind Hem and Blanket Stitch,) Machine Embroidery, Dense Machine Quilting, Subtle Machine and Longarm Quilting,