AuxON · Made-to-measure protection
AUXONbuilt on his leg.
Front tendon boots made for one job: protecting the tendons, the most exposed area of a sport horse. Built to his measurements, one by one: ExoShell shell with AuxSpace technology, ExoScale protective scales right over the tendons, a MorphON liner that attaches with magnets. No Velcro, no stitching.
Zero Velcro · zero stitching · built on his leg
If it doesn't fit at the first try-on, we take it back and remake it · for 24 months, we send you new straps and scales if they break
- AuxSpaceauxetic lattice→
- ExoShellshell→
- ExoScaleprotective scales→
- MorphONliner→
- 1:1to his leg→
- 01 ShellExoShell
- Colour
Carbon look: a raised herringbone texture in the shell colour. It's the surface design, not carbon fibre.
- 02 Protective scalesExoScale
Carbon fibre only comes in black.
- 03 LinerMorphON
- Colour
One liner is included. Soft on the leg, it shows through the shell's gills and at the edge.
+ Spare liner
Tap a colour to add one. Liners attach to the shell with magnets: you swap them in a moment, for another colour or to wash them. €59 per pair, VAT included.
- 04 Straps
- Colour
Elastic, two-tone: the first colour is the visible face, the second shows in the ON-H logo, the pockets and the edges.
- 05 Measurementswith a tape
After ordering we email you the guide as a PDF. Two ways: with a soft tape measure, measuring each point two or three times to be sure, or by scanning the leg with your phone, using the app we point you to.
Soft tape measure, front leg weight-bearing. The five circumferences in red, then the height from the fetlock to below the knee (dashed). Measure each point two or three times: if the numbers differ, write the average. The 3D shape adapts as you type; after ordering we confirm them together.
For several horses, send us each horse's measurements after ordering. Pairs in different colours: order the first, change the colours and order the next; the discount still applies.
- If it doesn't fitat the first try-on: we take it back and remake it
- If something breaksa strap or a scale, within 24 months: we send you a new one
- Measurementsyou send them after ordering, with our guide
Guarantee terms
If it doesn't fit at the first try-on, send it back within 14 days of delivery, with no signs of use, and we remake it free of charge, once.
For 24 months from delivery, if a strap or a scale breaks with normal use, we send you a new one.
The 24-month legal guarantee of conformity still applies. Guarantor: ON-H di Callegari Roberto, Vicolo Ambach 10, 39052 Caldaro (BZ), Italy.
Made to order · first orders delivered in 15–18 days, then in order of arrival: we confirm the date by email · free shipping · 3 instalments with Klarna or PayPal
Made to measure, so there is no right of withdrawal. If it doesn't fit at the first try-on, we remake it · 24-month legal guarantee
Manifesto
A tendon boot doesn't need to be pretty. It has to protect the part of the leg that stops a horse when it gives way.
Every jump ends with a landing, and in that half second all that matters is what sits between his tendons and the knock. For years the answer was the same: padding, stitching, Velcro. We started again from there, from protection, and built everything else around it.
| The usual tendon boot | AuxON | |
|---|---|---|
| Construction | Spesso strati diversi, cuciti | One single design, zero stitching |
| Closure | Velcro or buckles | Studs and elastic straps |
| Inside | Neoprene, foam or gel | AuxSpace lattice and MorphON mesh liner |
| If it gets damaged | Usually the whole boot is replaced | You replace the part |
| Fit | Standard sizes | To his leg |
The area most at risk
Behind the cannon run the tendons.
The flexor tendons carry the horse's weight at every stride and every landing. They are the most delicate part of a sport horse's leg, and they are exposed exactly where the knocks land: the hind hoof, a pole, a misstep. An injury there can stop him for months. Sometimes for good.
Anatomy
Four parts.
One single design.
Look: your AuxON comes together on the leg, piece by piece.
- 01The shellExoShell, AuxSpace lattice. The heart.
- 02The protective scalesExoScale. The armour over the tendons.
- 03The linerMorphON, a mesh. It comes out.
- 04The strapsElastic. Zero Velcro.
Elastic straps on studs made with the shell, three positions per strap: no Velcro clogging up with mud. The AUXON lettering isn't a label: it's made in the shell, in the same piece.
Choose your AuxON's colours ↑AuxSpace technology
From aerospace to your horse's legs.
Under the spine and over the fetlock the shell is an auxetic metamaterial, designed cell by cell: under a knock the re-entrant cells close toward the centre instead of spreading out. Cells, walls and skin are one single piece.
Animated, illustrative diagram, not a simulation or a measurement on the part. It shows the behaviour that theory predicts for the two materials: the foam (positive Poisson's ratio) spreads and gives way; an auxetic lattice (negative Poisson's ratio, ≈ −0.66 for the AuxSpace cell according to the beam model of Gibson and Ashby, Cellular Solids, 1997) draws material in under the point of impact and resists indentation more (Lakes, Science, 1987). The family of auxetic metamaterials is studied and used in aerospace.
AuxSpace technology
The lattice inside the shell.
Cut the ExoShell shell open and you see it: it isn't solid. Under the skin there's a lattice designed cell by cell. Beside the tendon and over the fetlock the cells are re-entrant, butterfly-shaped: under a knock they close toward the point struck. On the wings the lattice is continuous and light, flexes with the leg and lets air through.
Protection
Two layers of defence.
Outside, ExoScale: nine rigid protective scales, overlapping like roof tiles right over the tendons. Inside, the AuxSpace lattice. The ExoScale scales come in glass fibre or carbon fibre. Over the fetlock the shield covers where the knock lands; at the back the arch stays open, so the fetlock bends freely in the jump.
Choose your AuxON's colours ↑AuxSpace technology
Breathes.
Designed to let heat out: air comes in through the gills that cross the shell on the sides, passes through the mesh liner along the leg and leaves at the top edge. That's exactly where the liner colour you chose shows.
Illustrative diagram of the air path, not a measurement.
MorphON technology
Made precise, turns soft.
The MorphON liner is made compact, so every diamond of the mesh comes out crisp, and then it softens: it reaches the leg soft, not hard. Ten neodymium magnets hold it in place in the ExoShell shell: to take it out, just pull. It washes and goes back in a moment; with a spare liner the boot is always ready: €59 per pair.
Made to measure
1:1
Built on his leg. Unique, like him.
- Choose colours and materials above.
- The measurements: with a tape, five circumferences and one height measured two or three times, or by scanning the leg with your phone. Now or after ordering, with our PDF guide.
- We build your AuxON on the shape of his leg, left and right.
- We make it to order: your pair joins the list. First orders are delivered in 15–18 days; after that we follow the order of arrival and confirm the date by email.
AuxON by ON-H
36
Protection, redesigned.
Thirty-six versions to get to this one. Designed and made in Italy by ON-H, pair by pair, left and right each with its own design.
Your AuxON—€480 per pair
If it doesn't fit at the first try-on, we take it back and remake it · cambia i colori ↑
Your AuxON, at full size
Scan the code with your phone: your configuration opens. Then tap “On the leg, in AR” and place it in the room or next to your horse, at 1:1 scale.
Your AuxON