What is this stuff on the back of my leather scraps? : r/Leatherworking

I made my first thing! It's a sheath for my skiving knife made with random leather scraps. More in comment. : r/Leathercraft

Toprank Genuine Leather Sheets for Crafts 6X12'' Precut Full Grain Leather Tooling Leather (1.6mm) Cowhide Leather Pieces Square, Tan

Leather scrap ideas : r/Leathercraft

Rustico 2lb Box of Dark Brown Colored Top Grain Leather Remnants and Leather Scraps in Form USA Raised Cows, 2 – 3 MM Thick (4.5-5.5 Ounces) Leather for Crafts

Women's Luxury Leather Handbag, Leather Handbags for Women

DIY Money Clip Wallet Leather Kit

What is this stuff on the back of my leather scraps? : r/Leatherworking

ArtSkills Leather Craft - 64 Pieces - Carve, Stamp & Dye Real Leather - New

ELW 2-6 oz (.8-2.4mm) Thickness, 2 LB Vegetable Tanned Leather Scraps, Lightweight, Cowhide Remnants Full Grain Leather for Tooling, Holsters, Knife Sheath, Carving, Embossing

3 lbs. Assorted Leather Remnants - Furniture Offcuts - Various Colors

Upholstery Leather Scraps Divina Creative Group Inc.