
A comfortable fit. Extra reassurance on everyday walks.
The Thule Dart martingale collar combines a softly padded feel with a design that helps prevent slipping. Its martingale section tightens slightly when the lead is under tension, while the adjustable fit and protective sleeve keep everyday comfort in focus. Available in Black and Dark Slate, a muted blue-grey shade, in sizes S, M and L.

Key Features
- Martingale opening tightens slightly under tension to help reduce the chance of your dog slipping out.
- Soft protective sleeve cushions the neck and helps reduce pressure and rubbing.
- Standing D-ring makes clipping on a lead quick and easy.
- Reflective webbing and logo improve visibility during low-light walks.
- Adjustable fit and secure buckle make everyday fitting and removal straightforward.

Sizing Guide
Measure around your dog’s neck where the collar will sit, using a soft measuring tape. Match the neck circumference to the table below and adjust for a secure, comfortable fit. These figures are dog neck circumferences, not collar widths or flat lengths. Check the fit before each walk and follow the fitting instructions supplied with the collar.
| Size | Dog neck circumference | Collar net weight |
|---|---|---|
| S | 22–37 cm | 0.04 kg |
| M | 35–52 cm | 0.05 kg |
| L | 50–65 cm | 0.11 kg |
All sizes are available in Black and Dark Slate. Net weight is the weight of the collar itself, not a dog weight limit.

Easy to Clip On
The upright D-ring is easy to find when you are ready to attach a lead. The secure buckle makes the collar straightforward to put on and take off, while reflective details add visibility for early starts and evening walks.

FAQs
What does the martingale section do?
It tightens slightly when the lead is under tension to help prevent the collar slipping over your dog’s head. Correct adjustment is essential.
Is the collar padded?
Yes. The soft protective sleeve cushions the neck and helps reduce rubbing.
Which size should I choose?
Measure your dog’s neck and use the circumference ranges above. If you are unsure about the fit, contact us before ordering.