ONEFOJOJO SY3099 Large-Dog Nylon Martingale Collar

Large-Dog: The ONEFOJOJO SY3099 martingale collar is a nylon, pull-on walking collar listed for large dogs with necks measuring 18 to 25 inches. Its tightening loop is intended to reduce the chance of a dog backing out, but the listing says to use it only for walks and not leave it on unattended.

At a glance

Martingale loop tightens when a dog pulls, according to the listing, and is designed to help prevent backing out of the collar.
Slips over the dog's head and has no buckle, making sizing and head fit important.
The listing recommends measuring the dog's neck and leaving space for two fingers.
Listed as nylon with a 1-inch width and forest design.

Price

$8.38Save 35%

Reference price: ~~$12.98~~

Price checked: Nov 12, 2026

View offer

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Pros and cons

Pros

Slip-on martingale construction provides a tightening loop intended to help keep a dog from backing out during walks.
The listed 18–25-inch neck range gives large-dog buyers a specific size reference.
Machine-wash care is listed, and the nylon material is suitable for routine collar use as described.

Cons

No buckle is listed, so the collar must fit over the dog's head as well as sit correctly at the neck.

Technical specifications

14 specifications

Identity
Brand	ONEFOJOJO
Model	SY3099
Collar type	Animal Martingale Collar
Recommended dog size	Large
Age range	Adult

Fit and dimensions
Size	L (Neck 18"-25")
Dimensions listed	25 x 1 x 0.04 inches; 2.47 ounces
Item dimensions	25"L x 1"W

Materials and care
Material	Nylon
Pattern	Forest Design
Color	3
Closure type	Pull On
Care instructions	Machine Wash

Package quantity
Number of items	1

What to know before buying

Listing details to confirm

Use for walks only and do not leave the collar on an unattended dog. Measure the neck before ordering and allow room for two fingers. The listing describes hand washing in its feature text but machine washing in care details, so the cleaning method is inconsistent. Its color field is shown only as “3,” which does not clearly identify a color.

Who is it for?

A good fit for

Owners of large dogs whose necks measure within the listed 18–25-inch range and who want a martingale collar for walks.
Buyers seeking a nylon collar with a forest pattern and a pull-on fit.

Less suited to

Dogs whose neck or head size will not allow this slip-on collar to fit properly.
Owners needing a collar for unattended wear or continuous use.

ONEFOJOJO SY3099 Large-Dog Nylon Martingale Collar · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 371 ratings

5 stars77%77%
4 stars10%10%
3 stars8%8%
2 stars2%2%
1 star3%3%

Customer feedback highlights positive impressions of quality, appearance, durability, fit, color, adjustability, and resistance to slipping out during walks. Those fit and non-slip reports are relevant to a slip-on martingale design, but they are customer perceptions rather than a guarantee for every dog. The overall rating distribution is mostly favorable while still including lower-star ratings, and it does not identify specific reasons for dissatisfaction.

Positive themes

Customers report liking the collar's appearance and vibrant color.
Feedback describes the collar as durable and of good quality.
Customers mention easy adjustability and a good fit.
Some feedback praises its resistance to slipping off during walks.

Frequently asked questions

What neck size is this collar listed for?

The listed size is L, for a neck measuring 18 to 25 inches. Measure your dog's neck and leave space for two fingers, as the listing advises.

Does this collar have a buckle?

No buckle is listed. The collar is described as slipping over the dog's head, so make sure its fit works for both the head and neck.

Can the collar stay on all day?

The listing says martingales are for walks only and should not be left on an unattended dog.

How should it be cleaned?

The care details say machine wash, while the feature text says easy to wash by hand. The listing is inconsistent, so confirm the preferred method before cleaning.