MASBRILLLight Up Dog Collar, LED Dog Collar Lights for the Dark, Rechargeable and Waterproof Flashing Dog Collars with 3 Glowing Modes, Adjustable Pet Collar for Small/Medium/Large Dog(Green S)

I purchased a MEDIUM size for my 4 year old English Springer Spaniel and it is way too big. It is so loose you could not use it as a regular collar as it slips easily over her head. I have had to secure it with a carabiner to her own collar. The Medium size measures 49cm at its smallest and 51cm extended.Otherwise the light is good, the construction appears excellent and the plastic stopper over the charging point may prevent mud, sand and water getting into the mechanism.

I bought 3 of these for exuberant and adventurous collie puppies, to see where they are in the woods on these dark Autumn/Winter nights.The first thing to say is that they are very bright, so much so that at times I've had to shield my eyes to avoid losing all my night vision. That's not a complaint - I can see where my dogs are from an impressive distance even in woodland with some small bushes. They can't hide for long.The second point is that the battery (from new) lasts ages. I didn't charge them at all when I received them and they lasted for at least 3 weeks of daily use before the first one gave up. Charging only takes a few hours and is easily achieved overnight ready for the next 3 weeks.The collars were easy enough to adjust, and I was able to feed some of the LED material into the clips to ensure a good fit on small necks. The sizes listed were a sufficiently reliable guide so I have no complaints there.Really, these have been superb. They are also hilarious, with 3 playing dogs looking like low-flying UFOs as they zip about the garden in the dark. For safety and peace of mind they are superb, and wish I'd had these twenty years ago for previous canine friends. You are unlikely to regret buying these.

This collar is fantastic!! We have a black lab puppy that you can hardly see when it gets cloudy… let alone dark…. this collar is perfect, so bright you can see him from far away! We only used it few evenings so can’t comment on battery life, but so far so good. It also looks pretty sturdy. I ordered M size which is bigger than what we need at the moment but it’s adjustable and the pup is growing fast…. So even though it looks bit big on him at the moment, it’s fine and I’m hoping this collar will last us a few months… and once it’s too small, will definitely buy a size up👍Love it and got a lot of other dog walkers commenting on it and asking where I got it from. Really good for the winter evenings walks!!!

I didn't want a collar that was too bright or draw too much attention, but wanted a collar that would help my black dog be more visible on a dark evening walk. I chose the red and it is perfect. Enough light to make him stand out, but not too much that it annoys him or traffic.The charge lasts for days and easy to top up when needed. The collar itself was a little stiff at first, but it seems to be softening up the more he wears it.I am tempted to buy the blue one next as it will match his winter coat!

Really nice functional collar. I chose medium which fits my young Labrador and will defiantly do for this winter with the adjustable size. Might be a little tight for a fully grown Labrador so check measurements before choosing a size.The green is nice and bright and I super easy to charge. The d ring to attach the lead to looks sturdy and the collar is a nice width.A small criticism would be I’d like the packaging to be 100% recyclable, it has a little plastic window to see colour, this might be necessary if also sold in shops.

We lost a previous light up collar we bought, which was a transparent plastic loop that pushed into a little usb light, because the collar popped out of the light whilst walking the dog. This time we wanted to find a collar with secure clips so that it wouldn’t fall off. This collar is certainly more secure and is very bright. So far it has lasted a good month before needing a charge, with the dog walked 20mins each night. The one downside is that this collar is quite clunky and, although the dog is used to it now, it feels a bit awkward on our mini schnauzer. We only use it at night, so for occasional use it is ok and does certainly make our black dog visible on winter nights. If you were shopping for a smaller breed and want them to wear the collar all the time I would look elsewhere, however if you have a larger dog or are only putting this on for an evening walk it is good at what it does.

Such a shame as these as expensive and I don't think I can get my money back. Brilliant on one of my dogs who has smooth fur, but the other one I purchased has only been in my slim pug for an hour a day when they are walked earlier morning and evenings in the dark. After 1 month of use like this, it has rubbed (on the largest loose setting) a large bloody sore patch on his scruff and throat. Really disappointing as the lights are very good. Just a warning to owners with dogs like pugs or those with skin around the scruff of the neck. :(

The media could not be loaded.  Great quality webbing light up collar. D ring quite large and difficult to get ID tag on. I measured my Dogs necks at 11 and 17 inches so ordered the small and medium sizes which should have been perfect. Sadly the small is 17 inches and the medium is 20 inches long (see photos). I will have to return the medium as even when my dog is fully grown 20 inches will be too big. The small fits the larger dog perfectly. Very pleased with it otherwise.