Looking for a Hydration Bladder? Here’s Everything you Need to Know

March 09, 2022

Looking for a Hydration Bladder? Here’s Everything you Need to Know

Staying hydrated on the water is vital to an athlete’s safety, health, and wellbeing. But while training out to sea, having quick and easy accessibility to fresh water is not an easy task. Water bottles can be bulky, heavy, and when moving around inside a vessel, can cause significant damage. Keeping that water bottle within arm’s reach and secured to the boat can also be challenging. 

Here at Vaikobi, we are paddlers, sailors and ocean addicts ourselves, so we’ve designed a Vaikobi hydration bladder  ideal for paddlers, kayakers, and ocean athletes of every sporting discipline. 

What are hydration bladders?

A hydration bladder is a soft and durable bag that holds water comfortably on an athlete’s back during sport. Using a hydration pack allows paddlers to carry large amounts of water for long periods of time and provide fresh water via a tube, meaning the bag doesn’t have to be removed to take a drink. As your very own personal hydration system, a water bladder is a great addition to the inventory of any training athlete, particularly for long-distance sessions. 

The Vaikobi hydro system has a 1.5L reservoir capacity with a structured area that retains its shape and minimizes bounce. It is designed in combination with our paddling PFD life jackets, which contain hydration pockets on their backs and hose tabs for maximum convenience. Its 90cm length insulated tube allows you to route it through a PFD and locate it in an accessible position near your mouth, ready for use. This is ideal for paddlers who wear a PFD out on the water without having to carry an extra backpack. They are compatible with the VXP Race PFD Lifejacket and the V3 Ocean Racing PFD life jacket. 

It also has a high-flow mouthpiece that is leak and drip-free and comes with a cover. It contains no harmful chemical BPA, PVC, phthalate and is bisphenol-free. The hydro pack is made from food-grade TPU polyurethane that has no taste or smell. 

Vaikobi hydration bladder mouthpiece

Can you put a water bladder in any backpack? 

A backpack or lifejacket with a hydration pocket is the most effective way to carry a water bladder. If you place a loose water bladder in a bag, it can spill if the bag comes loose or comes into contact with other valuables in the pack. It is possible to put a water bladder in any backpack, but it should always be stored in a separate pocket and may require an extra clip or pocket on the backpack to hold it upright or secure it in place. 

How to use a hydration pack inside a life jacket: 

  1. After unpacking your hydration pack, connect your hose to the bladder. 
  2. Remove the circular cap at the top of the bladder, and fill the central bag with water. Re-secure your cap to prevent leakages.
  3. Secure the black attachment clip by sliding it into the top of the hydration pack - this will keep the bladder from moving inside or sliding out of the hydration pocket. 
  4. Slide the full hydration bladder into the pocket located on your PFD. 
  5. Feed the hose through the tabs located on the lifejacket, first passing over the shoulder and then to the tab on the front of the chest near the chin.   

Vaikobi hydration bladder in life jacket, hose

View the Vaikobi hydration bladders system instructional video here.


How to clean a hydration bladder: 

The Vaikobi hydro pack contains a four-piece cleaning kit that includes a dry rack, a long flexible brush, as well as a large and small brush. Use the brushes, a small amount of dish soap, and warm water to scrub the inside of the bag. This will prevent the build-up of bacteria over time. Clean the mouthpiece and run warm soapy water through the hose after use. At the end of cleaning, rinse the bag entirely with fresh water. The dry rack can be inserted in the bag to open the hydro pack, allowing the inside to air dry, ready for its subsequent use.  

water bladder cleaning kit

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XXS   161 167  54 58 76 81 62 66 78 82
XS   165 172  56 63 82 87 66 70 82 89
S   169  176  61 68 88 96 71 76 90 96
M   174 181  66 73 97 104 77 85 97 102
L   178  185  76 85 106 114 86 95 103 108
XL   183  190  86 95 116 122 96 105 109 115
XXL   187  194  96 105 124 132 106 114 116 122


Size HEIGHT (Feet + Inches) WEIGHT (Pounds) CHEST (Inches) WAIST (Inches) HIPS (Inches)
XXS   5'3"  5'6"  119 128 30 32 24.5 26 30.5 32.5
XS   5'5"  5'8"  123 139 32 34.5 26 27.5 32.5 35
S   5'7"  5'9"  135 150 34.5 38 28 30 35.5 38
M   5'9"  5'11"  146 161 38 41 30 33.5 38 40
L 5'10"  6'8"  168 187 41.5 45 34 37.5 40.5 42.5
XL 6'  6'3"  190 209 45.5 48 38 41.5 43 45.5
XXL 6'2"  6'4"  121 232 49 52 41.5 55 45.5 48




Y-S 132 139 30 34 60 65 56 61 68 72
Y-M 140 148  33 39 65 71 61 68 72 78
Y-L 147 155  40 47 70 76 67 73 77 84
Y-XL 152 162 47 54 75 82 72 79 83 89







    HIPS     (IN)
Y-S 4'3" 4'8" 66 75 24 26 24 26 27 28


4'8"  73 86 26 28 26 28 28 31


5'  88 104 28 30 28 30 30 33
Y-XL 5' 5'4" 104 119 30 32 30 32 33 35

Fit Tips

If one of your body measurements is in between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. If your body measurements for hips and waist correspond to two different suggested sizes, order the one indicated by your hip measurement.

How To Measure

WAIST: Measure around the narrowest part (typically where your body bends side to side), keeping the tape horizontal.
HIPS: Measure around the widest part of your hips, keeping the tape horizontal.
CHEST: Measure the fullest area of your chest. Stand up straight and breath normally.



Vaikobi size guide