Leather armor for cosplay and LARP is made from vegetable-tanned leather that is cut, shaped over a form, and hardened. It is costume and game gear, not protection against real weapons.
What leather armor does well, and what it doesn’t
Leather works well for curved pieces, such as breastplates, pauldrons (shoulder plates), greaves (shin guards), and bracers (arm guards).
It is not a good match for flat plates with sharp edges that look like welded sheet metal. Leather’s surface is uneven, and you can’t glue its edges together to mimic welding. For that look, EVA foam or thermoplastic is a better choice.
Leather can’t take a mirror-like chrome finish. It can, however, mimic hammered or aged metal well, especially with carved or textured surfaces and paint.
Choosing leather
- Vegetable-tanned only. Chrome-tanned leather won’t mold or harden.
- Main plates (breastplate, pauldrons, greaves): 8–10 oz, about 3.2–4 mm. Very rigid pieces can go up to 10–14 oz.
- Smaller or flexing parts (bracers, and lames, the small overlapping plates): 5–7 oz, about 2–2.8 mm.
- Heavier isn’t always better. Heavy plates are stiff, hot, and hard to move in.
Tools
- A round knife or a sharp utility knife with a fresh blade
- A hole punch set or swivel punch for rivets and hardware
- A hard, flat cutting surface
- A mallet, such as poly or rawhide
- Tools for setting rivets, plus rivets, buckles, and waxed thread or leather lace for assembly
Pattern and sizing
- Mock up the pattern in poster board or craft foam. Fit it on the body or on a dress form.
- Add a shrinkage margin. Leather shrinks as it dries and hardens.
- Transfer the pattern to the smooth side of the leather. Mark stitch lines and hole locations clearly.
Cutting, edges, and decoration
- Make rough cuts first, then detailed cuts.
- Bevel, sand, and burnish the edges.
- Tool, stamp, or emboss designs while the leather is damp, before molding.
- Dye the pieces after hardening, not before molding. Dyeing before molding often gives blotchy color.
Molding the pieces
- Dampen the leather evenly. For casing, see leather molding techniques.
- Form it over a body cast, mannequin, or foam form. Wrap the form in plastic film first.
- Clamp or tack the edges so the leather stays in place.
- Let it dry on the form for 24 to 48 hours.
Hardening
Hardening is a separate step. It shrinks and darkens the leather, and the amount varies by hide and method. Test each method on scraps first.
- Heat hardening, by low-oven baking or a brief hot-water dip, works on damp leather. Dampen the dried piece evenly before baking, and bake at about 65–90°C (150–195°F). For the steps, see baking leather to harden it.
- Hot wax works on fully dry leather. See can beeswax harden leather.
Assembly
- Hardware: copper rivets with burrs, double-cap rivets, Chicago screws, and buckles.
- Straps: about 1 to 1.5 inches (25–38 mm) wide for body pieces.
- Joints: Overlapping lames are riveted to internal leather straps. Use slotted (sliding) rivet holes so the plates can move.
- Seams: Some makers stitch seams with waxed thread and a saddle stitch.
Dye and finish
- Dye the pieces after hardening.
- Seal them with an acrylic finish such as Resolene, or with wax. Sealing also helps keep dye from rubbing off onto clothes.
Common mistakes to avoid
- “Hardened leather armor stops blades like steel.” It doesn’t. It is made for cosplay and LARP.
- “Thicker is always better.” Heavy plates are stiff, hot, and hard to move in.
- “Dyeing before molding gives even color.” It often gives blotchy color.
- “Rivets alone allow movement.” Rigid riveting locks plates. Articulation needs sliding joints.
Safety
- Wear eye protection when setting rivets.
- Check your LARP group’s armor and weapon rules before you build.