When leather is scarce, make harness straps from salvaged seatbelt webbing, flat-weave fire hose, canvas stitched in multiple layers, or nylon rope braided into flat straps, and cover every surface that touches the animal with cloth or other padding. Paracord inner strands make decent light lines but are not strong enough for traces alone.
Part of Harness & Yoke Making
Substitutes for harness leather: what each does well, what to watch for, and how to avoid skin injuries from hard-edged synthetic straps.
The Substitute Must Be Strong, Flat And Padded Where It Touches
Leather is stiff enough to spread pressure and soft enough to bed in. Most substitutes are strong but narrow or thin, so they cut or concentrate pressure unless they are padded and given width. That is why the source repeatedly pairs a strap material with a padding instruction.
| Material | What the source says | Where to use it | Watch for |
|---|---|---|---|
| Seatbelt webbing | Incredibly strong, already the right width for straps; salvage from any vehicle | Traces, surcingle, belly band | Narrower than a breast strap needs; pad underneath |
| Nylon rope | Can be braided into flat straps; cover with cloth padding where it contacts the animal | Traces, straps | Stretches and can part suddenly; inspect |
| Canvas | Multiple layers stitched together; not as durable as leather but functional | Straps, covers | Wears faster; check stitching |
| Fire hose | Flat-weave, extremely strong and already flat; excellent for traces and breast straps | Traces, breast strap | Pad inside; edges |
| Paracord | Inner strands woven or braided make decent light lines; not strong enough for traces alone | Light lines | Not for the load path |
Stretch and sudden failure of rope and nylon are general properties, not figures from the source article; treat them as reasons to inspect, and see Braided Rope and Rope Care.
What You Need
- Salvaged material from the table above.
- Stitching or rivets — see Saddle Stitch and Riveting and Lacing.
- Padding — see Padding & Cushioning.
- A tape measure.
Method: Substitute A Strap
Step 1: Match the job. Decide whether the part is load path (trace, breast strap) or light line (long-line).
Step 2: Measure the width. A breast strap should be at least 8 cm wide. Measure your material before you commit.
Step 3: Add width and padding if narrow. Put a wider padded piece between the strap and the skin.
Step 4: Finish the edges. Cut edges of webbing and hose can saw into skin; keep them off the animal or cover them.
Step 5: Test and check. Walk the animal loaded lightly, then examine the skin for hair loss, heat and swelling.
Worked Example
A salvaged strap measures 5 cm wide (an assumed figure). For the same pull and the same contact length, pressure is inversely proportional to width.
- Against the 8 cm minimum: 8 / 5 = 1.6 times the pressure.
- Against a 12 cm strap: 12 / 5 = 2.4 times the pressure.
So a 5 cm strap on its own carries 1.6 times the pressure of the minimum acceptable breast strap. Putting it over a padded piece at least 8 cm wide spreads the contact, though the strap itself still needs to carry the pull.
Common Mistakes
- Using paracord for traces — it is not strong enough alone.
- Putting webbing directly on skin — narrow, hard edges cut in.
- Assuming strong means safe — the strength figure is for the strap, not for its stitching or joints.
- Never inspecting nylon — it fails with little warning.
Safety
Strong straps do not break away
A harness that does not break may hold a falling or bolting animal to a vehicle, and a rope or nylon trace that parts under load snaps back. Keep a quick release at the hitch and a sharp knife on the handler, and inspect all joints and stitching before each use.
What’s Next
- Learn next: Padding & Cushioning — what goes under the strap
- Combine with: Breast Strap Design — width requirements