Jetpilot Cause Boys kids life jacket in Black/Blue, front view with the blue marble panel, two buckles and 40 tab

Child sitting in an inflatable tube by the water in the Black/Blue Cause Boys, with both buckles done up

Back of the Black/Blue Cause Boys with the blue marble print and vertical Jetpilot strip

Close-up of the vertical Jetpilot strip on the blue marble back of the Black/Blue Cause Boys

Child sitting on a tube looking out over the water, showing the marble back of the Black/Blue Cause Boys

Close-up of the two buckles, 40 tab and Cause print on the black front panel of the Black/Blue Cause Boys

Close-up of the marble print and Jetpilot strip on the back of the Black/Blue Cause Boys, worn by a child

Jetpilot Cause Boys Life Jacket - Black/Blue

L50S

$129.99 AUD

or 4 payments of $32.50 with

Colour:Black/Blue

Jetpilot Cause Boys kids life jacket in Green, front view with the monster arm and fish print, two buckles and 40 tab

Jetpilot Cause kids life jacket in Monster Blue, front view with the eyeball print, front zip and two white buckles

Jetpilot Cause Kids Life Jacket - Monster Green — image 3

Jetpilot Cause Kids Life Jacket - Pirate Black — image 3

Style Code: JA26211B

Colour: Black/Blue

Size: 3-4

3-4 4-6 8-10 12-14

Style Code: JA26211B

JA26211B

Cause Kids size guide

Their measurements

Size chart

How to measure

Weight first

Weigh them today. Kids' vests are sized by weight, so this decides the size.

Then chest

Wrap a soft tape around the fullest part of their chest, under their arms, keeping it level.

How the Cause Kids fits Pick the size they are now

Kids' lifejackets are sized by weight. Choose the size that matches your child's weight today, not the one they'll grow into: a vest that's too big can ride up.

Check the fit

The lift test

Zip it, clip both buckles (and the crotch strap on the smaller sizes), then lift the vest at the shoulders: it shouldn't ride up past their chin or ears.

Snug is safe

It should feel snug, not tight, when it's dry. It relaxes a little once it's wet, and a loose vest can ride up over their chin in the water.

Between two sizes?

Send us their weight and chest and we'll help you pick before you buy.

Chat with us 21-day returns

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About the Cause Boys Life Jacket

Built for kids who want to keep up with the big riders.

Older kids want gear that moves the way they do. The Cause Boys uses low-profile, bevelled-edge foam that cuts the bulk, so he can swim and climb back on board without a bulky vest in the way. A front zip and two buckles hold it snug, the EcoPrene shell is rated 30% lighter than traditional neoprene, and mesh drainage panels let water run straight out.

Approved to Australian Standard AS 4758 Level 50S.

Built for: boat days, jet ski rides and time in the water.
Best for: older kids who want to ride like the big riders.

Low-profile foam: bevelled edges, less bulk, more freedom
Zip and two buckles: snug, so it stays put
EcoPrene shell: rated 30% lighter than traditional neoprene
Mesh drainage: water runs out, so it stays light
Sized by weight: pick the size that fits him today

Complete your ride

Picked to go with this vest.

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Venture Handle Bar Bag $69.99

Jetpilot x Strong Arm Strap $49.99

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Venture 50L Waterproof Backpack $89.99

The Specs

Standard: Australian Standard AS 4758
Level: 50S
Entry: front zip and two-buckle closure
Shell: 100% EcoPrene, rated 30% lighter than traditional neoprene
Foam: Freelite approved bevelled-edge buoyancy foam
Drainage: durable mesh drainage gussets
Safety strap: padded neoprene safety strap on the smaller child sizes
Artwork: fully sublimated (dyed into the fabric)
Fit: relaxed multi-fit
Sizes: 3-4, 4-6, 8-10, 12-14
Details: 40 Year neck label and tab
Best for: recreational watercraft

Designed For

Boat Days
Jet Ski Rides
Tubing
Sized by Weight

The Fit

Pick the size they are now
Kids' lifejackets are sized by weight. Choose the size that matches your child's weight today, not the one they'll grow into: a vest that's too big can ride up.

Find their size

3-4: 15–25 kg, 58 cm chest
4-6: 15–25 kg, 68 cm chest
8-10: 25–40 kg, 74 cm chest
12-14: 40–60 kg, 85 cm chest

Snug is safe
It should feel snug, not tight, when it's dry. It relaxes a little once it's wet, and a loose vest can ride up over their chin in the water.

Check it on them
Zip it, clip both buckles and lift the vest at the shoulders: it shouldn't ride up past their chin or ears.

Tested. Trusted. Australian Certified.

Approved to Australian Standard AS 4758 Level 50S.

On the water
Level 50S is accepted on a jet ski on smooth and enclosed water (rivers, lakes, dams and sheltered bays) in every state, and for towed riders in every state that requires a lifejacket.

Kids on boats
Several states have extra lifejacket rules for children on smaller boats, and the ages, boat sizes and levels differ, so check your state's rules before you head out.

Always within reach
A lifejacket isn't a substitute for watching them. Keep kids close and in sight around water.

Look after it
Rinse it in fresh water after every outing, dry it out of the sun and store it hung up. Check the zip, buckles and foam before each use, and replace it if it's torn, crushed or badly faded.

Not the Right Fit? No Stress

We’ve got your back. If your new Jetpilot gear doesn’t fit right, isn’t what you expected, or turns up faulty, no stress - you can send it back or swap it out. You’ve got 21 days from purchase to return it, and we’ll sort you with a refund or exchange.

More info can be found here at returns & exchanges

Questions riders ask

What size do I need?

Go by your child's weight, not their age, and pick the size that fits them now: 3-4 and 4-6 are for 15–25 kg (the 4-6 is roomier in the chest), 8-10 for 25–40 kg and 12-14 for 40–60 kg. A vest that's too big can ride up. Under 15 kg? The Cause Infant is made for 10 to 15 kg: see our kids' life jackets.

Does it have a crotch strap?

Yes, on the smaller sizes: a padded neoprene strap that helps stop the vest riding up when they're in the water.

How do I check it fits?

Zip it, clip both buckles (and the crotch strap on the smaller sizes), then lift the vest at the shoulders. It shouldn't ride up past their chin or ears, and it should feel snug, not tight, when it's dry.

Is this vest legal on a jet ski in my state?

This colourway is Level 50S, approved to Australian Standard AS 4758. Level 50S is accepted on a jet ski on smooth and enclosed water (rivers, lakes, dams and sheltered bays) in every state. Queensland requires Level 50 once you're past smooth water, and Tasmania requires Level 100 or above beyond sheltered water. Rules change by state, so check yours before you launch. Our guide covers each state.

What's the difference between Level 50 and Level 50S?

They float the same. Level 50 comes in high-vis colours, so you're easier to spot, and it's the one Queensland requires past smooth water. Level 50S comes in every other colour and is the ski, wake and tow vest on smooth water in every state. Neither will turn you face-up on its own, so both are for riders who can swim, with help close by.

Is this an impact vest?

No. It's a lifejacket, approved to AS 4758 and tested to keep you afloat. An impact vest without an AS 4758 level mark isn't a lifejacket, so it doesn't count where one is required on the ski or behind the boat.

What if the size is wrong?

Swap it or send it back for a refund within 21 days of purchase. Sale items are the exception. Returns and exchanges has the steps.

How do I look after it?

Rinse it in fresh water after every sesh, dry it out of the sun, keep it away from fuel and store it hung up, not crushed under the esky. Check the zip, buckle and foam before you ride, and replace it if it's torn, crushed or badly faded.

Not Sure What You Need?

Hit us up! - We'll point you in the right direction and get you sorted with the right gear.

Jetpilot Cause Boys Life Jacket - Black/Blue

$129.99 AUD

Free Standard Shipping* Aus Wide Orders $200+

Cause Boys Life Jacket

The Cause Boys is a kids' life jacket with artwork they'll want to wear and a build parents can trust. It's approved to Australian Standard AS 4758 Level 50S, with a front zip and two buckles, mesh drainage panels, a padded safety strap on the smaller sizes and a light EcoPrene shell.

Sized by Weight

The Right Fit, Right Now.

Kids' lifejackets are sized by weight, and a vest that fits today does its job better than one they'll grow into. Pick the size that matches their weight now, zip it, clip both buckles, and lift at the shoulders to check it stays put.

What Hits Different

Certified Safe for Little Riders

Approved to Australian Standard AS 4758 Level 50S, the standard your state's lifejacket rules are written around.

Secure Fit, Easy Wear

A front zip and two buckles with sturdy webbing make it quick to put on and easy to adjust, and a padded safety strap on the smaller sizes adds security.

Drains Fast, Stays Light

Mesh drainage gussets let water run straight out, so the vest stays light and comfortable when kids are in and out of the water all day.