Life Jacket – UnderDOG by MTI


A better way to float your best friend! With 90% of the buoyancy in the water under the chest area, the new underDOG life jacket supports the natural swim angle position of a dog.

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SKU: MTI-UnderDog. Categories: , , .

The life jacket for dogs that is the first ergonomically designed buoyancy aid for the swimming canine. With 90% of the flotation in the water under the chest and neck, the underDOG supports the natural swim angle of the dog. Traditional dog vests pull the body into a horizontal positions. With the underDOG the rear is allowed to sink lower than the forelegs, freeing the hind legs to swim more efficiently, while the neck is supported so that the head rides higher above the water line. It works with your dog so they are less fatigued after a long swim – they would tell you so if they could!

The split foam body has a mesh top to keep a dog cool. 2 body straps, a neck strap, and a chest strap that can be adjusted to fit a wide variety of dogs, including hard-to-fit bull dogs and other barrel-chested breeds. Two grab handles provide even lift distribution, and are designed to support the full weight of a wet dog. The neck handle doubles as a handy leash attachment point.

Generous reflective trim on the body and the neck provides added visibility when in the water or running around the parking lot. Tough 500 denier Cordura fabric protects the belly from rough ground cover. The underDOG sets a new standard for canine life jackets.

Color: Mango/Red or Black/Gray

XS Chest: 12”-18’ Weight: 2 – 12 lbs

S Chest: 18”-24” Weight: 12-24 lbs

M Chest: 24”-30” Weight: 24-60 lbs

L Chest: 27”-36” Weight: 60-90 lbs

XL Chest: 33”-44”Weight: 90-120 lbs


Please take a look at how to properly care for your life jackets.

Caring For Your Life Jackets


Weight 0.9 lbs
Dimensions 12 × 12 × 4 in
UnderDOG Size

XS (2 – 12 lbs), S (12 – 24 lbs), M (24 – 60 lbs), L (60 – 90 lbs), XL (90 – 120 lbs)

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