Whistler 20L

  • All SOURCE Hydration Systems are BPA and EA Free
The Whistler is our ultimate freeride hydration backpack designed by pro riders for SOURCE. It holds up to 3L of Hydration and 20L of Cargo and it features a rain cover, helmet sling and many other practical features to store protectors and any other gear needed on the trail.
  • Raincover for this pack included
  • 3L SOURCE Hydration System included
Whistler 20L Hydration Pack Orange Yellow
Care & Use

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Whistler Hydration Pack designed for biking

20L Cargo Capacity + 3L Widepac Hydration System

The ultimate freeride hydration pack! Lightweight, clean design, incorporating Source’s latest pack and hydration technology.  The Whistler is designed by pro riders for pure freeride sessions. Extra-long straps secur helmet and pads when not in use.

Whistler Hydration Pack Features

  • Lightweight Fabrics - Ripstop 70D Nylon
  • Loop for helmet attachment
  • Padded shoulder straps
  • Valve Docking station
  • Adjustable sternum belt with integrated whistle
  • A padded and vented back system with porous foam
  • Elastic strap retainers
  • Fast access hip pockets for easy reach and more storage
  • Lightweight buckles
  • External straps for fastening protective gear
  • Concealed rain cover
  • Reflective LED tab holder
  • Essentials compartment with internal storeganizer™
  • Insulated hydration compartment
  • Carrying handle

SOURCE Hydration Features:

  • 3 L / 100 oz Widepac™ hydration system
  • Helix™ bite valve - Comfortable valve with safety shutoff mode
  • Co-Ex tube
  • Tube comes with our special UV protection thread cover
  • Triple layer taste and odor free film
  • Glass Like™ Film Technology
  • Grunge-Guard™ Technology
  • Taste Free™ System
  • Easy Care & Low Maintenance


  • Size - H 46.5cm W 26.5cm
  • Weight - 949 gr
  • Volume - 20L
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Whistler 20L

Whistler 20L

The Whistler is our ultimate freeride hydration backpack designed by pro riders for SOURCE. It holds up to 3L of Hydration and 20L of Cargo and it...

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Great size for winter rides
I'm out in winter also and needed a pack with additional storage for extra clothes and protection. The Whistler totally fits the profile.
This review has been posted for  Whistler 20L
Very nice pack
I have used it a lot. It's perfect for mountain biking, quite comfortable on the back and have a lot of room and compartments for a medium size pack.
This review has been posted for  Whistler 20L
Reply by SOURCE
Thank you for your review.
WOW! I've finally found the perfect hiking day pack!
Though it is designed for and marketed towards biking use, this pack is perfect for a long day hike. It has so many little pockets for your bits and pieces and enough space for food, layers of clothing and of course water. Great quality fabric and fastenings. As per the other review, the mouthpiece from the hydration bladder doesn't seem to sit quite right but this is only a minor issue and didn't impact much on the use of the bag.
This review has been posted for  Whistler 20L
Very comfortable hydration pack.
Have used mine for the last 12 months.
Enough space for a day out hiking, can fit a small first aid kit, torch, rain jacket, sandwiches, fruit etc.
Side pockets are great for additional water/sports drink or hiking poles.
Pack straps on the back can be used to attach a rolled up jumper or 2.
Convenient Rain cover that has come in handy a few times, also it detaches :) used it as a dry seat on wet grass.
Plenty of loops for karabiner clips.
If it doesn’t fit in the pack I can strap it somewhere to the back.
No issues with quality, all seams and zips are still like new.
The only possible criticism is that the design of where the hydration tube leaves the pouch could be improved upon, it is at times awkward to poke the tube through the hole out the top, and the tube position around the top of your shoulder never seems to sit right. Hopefully source can improve this in the next model.
Highly recommend as a hiking day pack. Plenty of my fellow hikers have commented on how good my pack looks :)
This review has been posted for  Whistler 20L
  • Orange Yellow Orange Yellow

" Our tester left water in the Widepac for eight weeks without cleaning and reported no stinky taste or smell."
" More to love: The top opens wide like a paper bag for rapid filling. "

Vital MTB
star star star star star
Source Whistler

" The Whistler really shines in the volume department..."
" The lightweight pack felt centered and didn’t shift around much..."

Mountain Bike Action Magazine SOURCE Hydration Review

" You owe it to yourself to use one of Source’s reservoirs. They truly are the best, cleanest-tasting reservoirs we’ve ever used. "

Source Widepac

" The test ride was nothing short of brutal, in thick blizzards ... Everything in the bag was still bone dry."
" The removable bladder in the Source Fuse was the best I’ve ever used."
" I had to shove a whole lot of things in this backpack. The shape of the bag didn’t change or bulge at all."
" Most of the time I was cycling I almost managed to forget I was wearing a hydration pack at all."

SOURCE Ultimate Review
Source Ultimate Review

" Forget about the plastic taste of your standard hydration system. The Widepac gives you full original taste of your drink from the first sip."

Gear Junkie
star star star star star
Source Widepac

" Everything you need to haul gear while bombing the trails ..."

Vital MTB
star star star star star
Source Widepac Hydration System

" Filling up Source bladders is easy thanks to the wide opening."
" The Helix is drip-free, and very easy to drink from. "
" It is one of the easiest to use thanks to its nearly self-maintaining properties, and it is completely taste-free."