The Revolution of Cold
Our Down Shift™ Hydration Pack features our revolutionary Cold Flow™ System that keeps water chilled for over 4+ hours. Designed to shift weight down for a stable ride while offering ample storage for your gear. Water stays cool. You stay comfortable. Mile after mile.

Cold Flow™ System
Our revolutionary Cold Flow™ System includes an insulated reservoir, neoprene reservoir sleeve with reflective lining and articulated back panel to keep water cold for over four hours.


Insulated Reservoir
The HydraPak® IsoBound™ 2 L insulated sweat-proof reservoir helps to maintain cold water temperature for hours.
Neoprene Sleeve with Reflective Lining
Insulating neoprene reservoir sleeve with reflective lining keeps heat out and reflects cold back in.


External Airflow Design
The articulated back panel keeps space between you and your pack, letting air flow to avoid body heat transfer.
Product Details
- HydraPak® IsoBound™ 2 L Insulated Reservoir
- High-flow HydraPak® Blaster Bite Valve self-seals after each sip
- HydraPak® Plug-N-Play™ connect system lets you easily disconnect the hose and remove the reservoir from your pack for convenient refilling
- Padded back panel for added comfort
- Fully adjustable shoulder, sternum and hip straps
- Soft pocket for sunglasses or a phone
- Helmet attachment loops
- Chest strap with integrated whistle
- Webbing for a bike light attachment
- Key clip
Size and Dimensions
Volume | 14 L |
---|---|
Weight | 2.2 lbs |
Best Use | Mountain Biking |
Water Capacity | 2 L |
Dimensions | 18” L x 10” W x 7” D |
Gender | Unisex |
For a stable ride
Shifts weight with a lower reservoir position for a low centre of gravity and increased stability.
Grab and go
Multiple storage compartments designed to quickly access tools, snacks and sunglasses with plenty of space for a layer.
Take anywhere
The fabric is puncture, tear and abrasion resistant, yet lightweight and portable. The robust base construction provides durable support on any surface.
We have great faith in our products
Hydro Flask guarantees this product with a limited lifetime warranty against manufacturer defects.
Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:
-
92 Non-profits supported non-profits.
-
$1.5 million Dollars (approx. £1.197 million) donated donated.
-
26,043 Bottles donated bottles.
Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:
-
92 Non-profits supported non-profits.
-
$1.5 million Dollars (approx. £1.197 million) donated donated.
-
26,043 Bottles donated bottles.