E-Collar Replacement Straps and Bungee Collars

By INVIROX Training Team · Published 2026-11-01 · 7 min read

Why the strap matters more than it looks

The strap has one job: hold the receiver in a fixed position with the contact points pressed against skin. Everything the system does depends on that, and nothing about the electronics can compensate when it fails.

A strap that has aged does not fail obviously. It gets slightly stiff, or slightly stretched, and it stops holding the same tension through movement. The receiver rotates a few degrees, contact becomes intermittent, and the dog responds sometimes and not others.

That symptom is identical to a low battery, similar to a range problem, and easy to read as the dog choosing when to listen. Owners commonly replace a whole system over a worn strap, which is an expensive way to solve a twenty dollar problem.

→ Related reading: the full troubleshooting order

When to replace one

Check the strap monthly. It takes a few seconds and it is the cheapest maintenance in the whole system.

• It has stiffened and no longer curves smoothly around the neck.
• There are cracks at the holes, which is where they always start.
• It has stretched enough that the hole you used to use is now too loose.
• It holds an odour after repeated soaking, which usually means the material has begun to break down.
• The buckle or keeper has deformed and no longer holds the tail flat.
• You have moved the fit two holes tighter over a year without the dog losing weight.

That last one is the quiet tell. If you have been gradually tightening to keep the same feel, the strap has stretched and it will keep stretching. Replace it rather than continuing to chase the fit.

TPU straps

A TPU or biothane strap is the default for most dogs, and for good reason.

It does not absorb water, which matters on a dog that swims or works in wet grass. It wipes clean rather than needing to be washed. It holds its shape rather than softening with use. And with closely spaced holes it can be fitted precisely rather than to the nearest half inch.

• A range of roughly 9 to 29 inches covers essentially every dog from small breeds to giants.
• Closely spaced holes matter more than the range. The difference between correct and slightly loose can be half an inch.
• Around three quarters of an inch wide is the usual profile for a receiver strap.
• It can be measured and cut to length, which removes the flapping tail of excess strap.
• Colour is cosmetic, but a distinct colour per dog is genuinely useful in a multi-dog household.

For a short or medium coated dog on a system that gets used a few times a week, a good TPU strap will outlast several sets of contact points.

Bungee straps

A bungee strap contains an elastic section, and it solves a specific problem that rigid straps handle badly.

On a dense coat, a rigid strap has to be tightened enough to compress the fur, and that compression is only correct while the dog is standing still. As the dog moves, breathes hard or lowers their head, tension changes and contact comes and goes. The elastic section absorbs that movement and holds steadier pressure without needing to be over-tightened at rest.

The length note is the one that surprises buyers. A bungee strap always feels shorter than its stated maximum, because the elastic is designed to be under some tension in use. On a giant breed, measure carefully rather than assuming the top of the range will fit.

→ Related reading: getting contact through a heavy coat

Measuring and cutting

A strap that is right for the dog and cut to length is noticeably more comfortable than one buckled at the last hole with six inches of tail flapping.

1. Measure the neck high up, just under the jaw, where the receiver sits. That is a smaller figure than the base of the neck.
2. Add one finger of room. One, not two. Two fingers is the flat-collar standard and it is too loose for a contact device.
3. Fit the strap and wear-test it for a few days before cutting anything. Necks change with season and condition.
4. When you cut, leave two or three spare holes beyond your working hole in both directions.
5. Round the cut end slightly rather than leaving a square corner, which is more comfortable and less prone to fraying.

Do not cut a strap on a growing dog. Through the first year, keep the full length and re-check the fit weekly, because a strap set correctly in spring can be genuinely restrictive by late summer on a large breed.

→ Related reading: sizing for large and giant breeds

Fitting the new strap correctly

Replacing a strap is a two-minute job and it is worth doing carefully, because a new strap fitted badly recreates the problem you were solving.

• Transfer the receiver so the contact points face inward and sit symmetrically.
• Tighten the retaining screws firmly. A receiver that can slide along the strap will migrate around the neck.
• Position high on the neck, just under the jaw.
• One finger of slack, then check again after the dog has moved for a minute.
• Check the contact points at the same time. A strap change is a natural moment to confirm prong length still suits the coat.

Care that extends strap life

• Wipe the strap and the contact points weekly. Dried saliva and dirt degrade both the material and the contact.
• Dry it after swimming or heavy rain rather than leaving it damp on the dog.
• Take the collar off overnight, which halves the time the strap spends under tension.
• Store it flat rather than tightly coiled, which is what causes permanent curl.
• Keep it out of prolonged direct sun when not in use, since UV is what stiffens polymer straps over time.

None of that is demanding, and together it roughly doubles how long a strap stays in usable condition. The straps that fail early are almost always the ones that lived on a wet dog and never came off.

Keeping spares

A small spares kit prevents most of the interruptions that stop training for a week.

The useful set is one spare strap, one spare set of contact points in the length your dog needs, and the small tool or key for the retaining screws. Together those cost very little and they cover the two failures most likely to stop a session: a prong lost in the grass and a strap that finally cracks at a hole.

In a multi-dog household, spares are close to essential rather than optional, because a collar out of action means the dogs cannot be worked as a group, and that is when the training schedule quietly falls apart.

→ Related reading: choosing the right contact points