FREE shipping on all orders $74.95 and over.

Enable Accessibility

Search suggestions:

Search Best Sellers

  • Blaze Orange (850) Blaze Orange (850) Front Range Harness in Basalt Gray (042) Front Range Harness in River Rock Green (355) Blue Pool (410) Red Canyon (625) Moonlight Mountains (964) Spring Mountains (968) Coastal Mountains (973) Blaze Orange (850) Front Range Harness in Basalt Gray (042) Front Range Harness in River Rock Green (355) Blue Pool (410) Red Canyon (625) Moonlight Mountains (964) Spring Mountains (968) Coastal Mountains (973) Blaze Orange (850) Front Range Harness in Basalt Gray (042) Front Range Harness in River Rock Green (355) Blue Pool (410) Red Canyon (625) Moonlight Mountains (964) Spring Mountains (968) Coastal Mountains (973) Blaze Orange (850) Front Range Harness in Basalt Gray (042) Front Range Harness in River Rock Green (355) Blue Pool (410) Red Canyon (625) Moonlight Mountains (964) Spring Mountains (968) Coastal Mountains (973) Blaze Orange (850) Front Range Harness in Basalt Gray (042) Front Range Harness in River Rock Green (355) Blue Pool (410) Red Canyon (625) Moonlight Mountains (964) Spring Mountains (968) Coastal Mountains (973)
    Front Range® Dog Harness colors

    Front Range® Dog Harness

    padded, everyday adventure

    4.8
    Rated 4.8 out of 5 stars
    4,122 Reviews
    Original price $54.95 USD
  • Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001) Obsidian Black (001)
    Polar Trex™ Winter Dog Boots colors

    Polar Trex™ Winter Dog Boots

    winter traction & insulation

    4.3
    Rated 4.3 out of 5 stars
    335 Reviews
    Original price $54.95 USD
  • UP TO 25% off
    Fireweed Pink (627) Blue Moon (460) Campfire Orange (815) Blue Moon (460) Campfire Orange (815) Blue Moon (460) Campfire Orange (815) Blue Moon (460) Campfire Orange (815) Blue Moon (460) Campfire Orange (815) Blue Moon (460) Campfire Orange (815) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627) Obsidian Black (001) River Rock Green (355) Fireweed Pink (627)
    Quinzee™ Insulated Vest colors

    Quinzee™ Insulated Vest

    packable & insulated

    4.8
    Rated 4.8 out of 5 stars
    346 Reviews
    From $56.21 USD - $67.46 USD $56.21 USD - $67.46 USD
  • 25% off
    Aurora Teal (421) Obsidian Black (001) Aurora Teal (421) Obsidian Black (001) Aurora Teal (421) Obsidian Black (001) Aurora Teal (421) Obsidian Black (001) Aurora Teal (421) Obsidian Black (001) Aurora Teal (421) Obsidian Black (001) Aurora Teal (421)
    Cloud Chaser™ Dog Jacket colors

    Cloud Chaser™ Dog Jacket

    waterproof softshell jacket

    4.6
    Rated 4.6 out of 5 stars
    285 Reviews
    Original price $89.95 USD $67.46 USD
Aurora Teal
Aurora Teal
Aurora Teal
Aurora Teal
Aurora Teal
Aurora Teal
Aurora Teal
Aurora Teal
Campfire Orange
Campfire Orange
Campfire Orange
Campfire Orange
Campfire Orange
Campfire Orange
Campfire Orange
Campfire Orange
50% off
4.7
Rated 4.7 out of 5 stars
130 Reviews

Undercoat™ Dog Water Jacket

water-friendly insulation

Color

Selected: Aurora Teal

Choose size

Sizing Chart

Measurement is around the widest part of the rib cage. This style is Formfitting, meaning that it is snug and conforms to the body’s contours. In between sizes? Choose the larger size.

Product sizing chart table
Girth Back Measurement Size
13 - 17 in (33 - 43 cm) 10.5 - 14.5in XXS
17 - 22 in (43 - 56 cm) 13.5 - 17.5in XS
22 - 27 in (56 - 69 cm) 17 - 23in S
27 - 32 in (69 - 81 cm) 20 - 26in M
32 - 36 in (81 - 91 cm) 22 - 28in L
36 - 42 in (91 - 107 cm) 26 - 32in XL
Product Dimensions Figure
Product dimensions table
Length (A) Neck (B) Size
11 in (27.5 cm) 10.5 - 11.75 in (26.5 - 30 cm) XXS
14 in (35.5 cm) 13 - 15 in (33 - 38 cm) XS
18.5 in (47 cm) 15 - 17.5 in (38 - 44.5 cm) S
20.75 in (53 cm) 18 - 20.75 in (45.5 - 52.5 cm) M
22.75 in (58 cm) 22 - 24.5 in (56 - 62 cm) L
26 in (66 cm) 26 - 28.5 in (66 - 72.5 cm) XL
Shipping box icon.

Free Returns

 Leaf icon.

Better With Each Design

 Trail Tested Promise icon

Trail Tested Promise
Right Arrow

When it comes to exploring in and around water, the Undercoat™ Water Jacket offers warmth for dogs who can't resist making a splash in the colder, shoulder seasons or who are prone to getting cold when wet. It's an amphibious jacket that thrives in wet environments, using a formfitting laminated neoprene for insulation that stretches and moves with dogs as they romp and swim. Super-soft, articulated stretch StormSleeves™ are engineered to seal in warmth while maintaining freedom of movement.

Can be worn standalone as an insulative piece, or layered under the Float Coat™ Life Jacket if buoyancy is also needed.

WATER-FRIENDLY WARMTH

Laminated neoprene body is flexible and provides insulation in wet environments.

STRETCH SLEEVES

Articulated stretch StormSleeve™ seals in warmth and allows for natural swimming motion.

DRAINAGE HOLES

Small drain holes on belly panel allow water to exit.

Additional Features

  • Formfitting with a zippered closure and sleeves for core heat retention

  • Laminated neoprene body is flexible and provides insulation in wet environments

  • Small drain holes on belly panel allow water to exit

  • Articulated stretch StormSleeve™ seals in warmth and allows for natural swimming motion

  • Reflective trim for visibility in low-light conditions and light loop for attaching The Beacon™️

  • Materials

    • Body: 1mm neoprene laminated with stretch spandex fabric
    • Zipper: YKK Vislon Zipper
    • Reflective trim
    • Zipper flap: 200 denier polyester
    • StormSleeve™: Double-layer stretch spandex
    • Made in Vietnam

  • Care

    • Secure fasteners
    • Rinse with cold water after each use
    • Hang to dry
    • Do not bleach, iron, or dry clean

Undercoat™ Videos

  • About: The Undercoat™ Water Jacket

    Learn more about the Undercoat™ Water Jacket from Alli and Firnspiegel.

Find The Right Size For Your Dog

Measurement is around the widest part of the rib cage.

Sizing Chart & Technical Specs

Measurement is around the widest part of the rib cage. In between sizes? Choose the larger size.

FIT GUIDE

While each style of Ruffwear apparel is designed for its intended use, this guide generalizes our fits in three ways. The Undercoat is Formfitting with a zippered closure and sleeves for core heat retention

Fit guide table
Formfitting Regular Fit Relaxed Fit
Snug and conforms to the body’s contours. Can be worn standalone or layered under Relaxed apparel. Tailored with a bit of wiggle room. Can be worn standalone or layered under Relaxed apparel. A loose fit that drapes the body. Can be worn standalone or over Regular or Formfitting apparel. Works well for hard-to-fit dog shapes and sizes.
Product sizing chart table
Girth Size
13 - 17 in (33 - 43 cm) XXS
17 - 22 in (43 - 56 cm) XS
22 - 27 in (56 - 69 cm) S
27 - 32 in (69 - 81 cm) M
32 - 36 in (81 - 91 cm) L
36 - 42 in (91 - 107 cm) XL
Product Dimensions Figure
Product dimensions table
Length (A) Neck (B) Size
11 in (27.5 cm) 10.5 - 11.75 in (26.5 - 30 cm) XXS
14 in (35.5 cm) 13 - 15 in (33 - 38 cm) XS
18.5 in (47 cm) 15 - 17.5 in (38 - 44.5 cm) S
20.75 in (53 cm) 18 - 20.75 in (45.5 - 52.5 cm) M
22.75 in (58 cm) 22 - 24.5 in (56 - 62 cm) L
26 in (66 cm) 26 - 28.5 in (66 - 72.5 cm) XL
Find The Right Size For Your Dog chart
Select Size

17-22 in (43-56 cm)

Ratings & Reviews

4.7
Rated 4.7 out of 5 stars
Based on 130 reviews
Total 5 star reviews: 96 Total 4 star reviews: 24 Total 3 star reviews: 9 Total 2 star reviews: 1 Total 1 star reviews: 0
Slide 1 selected
Write a Review (Opens in a new window)
130 reviews
  • Caleb G.
    Verified Buyer
    Reviewing
    Undercoat™ Dog Water Jacket Medium / Aurora Teal (421)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Good shirt

    My pup looks so cute in his water shirt

    Was this helpful?
  • Karen D.
    Verified Buyer
    Reviewing
    Undercoat™ Dog Water Jacket XSmall / Campfire Orange (815)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    great for cooler weather adventures

    This fits well, and will be a nice addition to my float coat during cooler weather paddle boarding.

    Was this helpful?
  • Halee B.
    Verified Buyer
    Reviewing
    Undercoat™ Dog Water Jacket Small / Aurora Teal (421)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Under coat

    Keeps our GSP nice and warm!!

    Was this helpful?
  • Lisa S.
    Verified Buyer
    Reviewing
    Undercoat™ Dog Water Jacket Medium / Aurora Teal (421)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Handsome

    This is a neat liitle coat. Keeps him warm and dry

    Was this helpful?
  • Marty
    Verified Buyer
    Reviewing
    Undercoat™ Dog Water Jacket Small / Campfire Orange (815)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Best Water Apparel

    So well made, fits my 38 pound tripawd like a glove. Keeps most sand out, warms, and protects from sun. Well worth the cost. I just hose it off and hang to dry. Never smells . Stretchy and is very comfy. I just put a rubber band around the extra sleeve on inside and it eliminated the hanging sleeve. Highly recommend for all swim dogs and especially tripawd.

    Was this helpful?
Show More