Keeping the reservoir as light as possible while still offering improved control and structure, the Osprey Hydraulics LT 2.5L Reservoir delivers streamlined hydration for fast-paced adventures. Designed for hikers, trail runners, and minimalist explorers, it combines an ultralight build with smart features that make carrying and accessing water easier than ever.

Despite weighing just 168g, this high-performance reservoir is packed with practical innovations. From the Compact Slide-Seal opening and Dual baffles to the secure HydraClip integration and hose magnet system, every detail is engineered to provide reliable hydration, better stability, and hassle-free use on the trail.

Key Features

  • Ultralight Profile: Weighs an impressively low 168g, making it an ideal choice for adventurers looking to reduce pack weight without sacrificing performance.
  • Optimised Top Closure: The Compact Slide-Seal opening supports one-handed filling, reduces bulk, slides easily into packs, and creates a secure, leak-proof seal.
  • Internal Structural Control: Specialised Dual baffles flatten the reservoir profile and improve stability when filling, pouring, carrying, and drinking.
  • High-Yield Mouthpiece: The redesigned Compact bite valve delivers excellent water flow, helping you stay hydrated with minimal effort during demanding climbs and long days outdoors.
  • Ergonomic Shut-Off Mechanism: A thumb-operated on/off lever is simple to use with one hand and helps prevent unwanted leaks when the reservoir is stored.
  • Tailored Backpack Suspension: Seamlessly integrates with the HydraClip reservoir hanger found in compatible packs, helping keep the reservoir secure and properly positioned.
  • No-Bounce Tube Management: An exceptionally secure hose magnet system keeps the drinking tube neatly attached to your sternum strap for quick access while on the move.
  • Safe and Clean Construction: Made entirely from BPA-free, lead-free, and phthalate-free materials, ensuring clean-tasting water and dependable durability trip after trip.
The LT (Lightweight) series is stripped down for fast-paced activities where every gram matters. Weighing in at an incredibly minimal 168g, it omits the rigid, heavy plastic backerplate found in standard models in favor of a highly flexible, streamlined design that appeals to trail runners and ultralight backpackers.
Instead of a hard plastic plate, it relies on smart internal geometry. Dual baffles flatten the profile and improve control when filling, pouring and carrying the reservoir, ensuring the water weight stays evenly distributed against your back rather than ballooning into an uncomfortable cylinder.
Absolutely. The redesigned Compact bite valve provides excellent water flow, allowing you to hydrate effortlessly without breaking your stride. Additionally, the Thumb-operated on/off lever is easier than ever to operate with one hand, ensuring you can quickly lock out the flow to prevent accidental drips.
The hydration kit comes equipped with an Exceptionally secure hose magnet system. By attaching the included magnetic clip to your backpack's sternum strap, the drinking tube docks firmly to your chest, remaining easily accessible and bounce-free.
To solve this, the top of the reservoir Seamlessly integrates with new HydraClip reservoir hanger in packs for secure carry. This allows you to suspend the bladder inside your hydration sleeve, keeping it upright and ensuring a consistent, uninterrupted flow of water.

Brand : Osprey

SKU: OSPR-102420

Model # : 10005151

Barcode : 843820160918  (AD-2)

Bladder Volume : 2.5L

Insulated : No

Volume : 2.5L

Weight : 168g

Dimensions : 39 x 19 x 6cm

Free shipping on orders over $140 to Australia*
Shipping on small orders (under $140) only $9.95
Shipping on all orders to NZ only $9.95
Express shipping to Australia & NZ only $15

Standard Shipping (AU) – FREE on orders over $140 and $9.95 on orders under $140. Orders are dispatched within 1 business day. Click here for shipping delivery times

Select ‘Standard Shipping – Auspost Only’ if you would prefer your parcel is sent with Auspost. Otherwise it will be shipped with any of our available carriers. Auspost Only shipping is not available on some very heavy/bulky orders.

Express Shipping (AU/NZ) – Need it faster? Express Shipping is available for $15. Express Shipping is not available on heavy/bulky orders. Orders placed before midday on business days are usually dispatched same day (otherwise within 1 business day). Delivery times in the table below.

Click and Collect – Shop online and collect in our Milton, Brisbane store, free for all orders. Orders are usually ready within 2 hours (during opening hours). Click here for address and opening hours.

Terms and conditions apply, click here for a full overview of our shipping policies

Osprey Packs are covered by Osprey's All Mighty Guarantee and will be repaired if faulty. Replacement may be offered if repair is not possible. Osprey Hydraulics Bladders covered by limited 1 year manufacturing defect warranty. Hydraulics Bladders & Soft Flasks: please visit https://support.hydrapak.com/hc/en-us/categories/115002258407-Warranty to lodge a direct warranty claim.

  • If you have selected the wrong product/size for you, or want to exchange/return for any reason except for warranty or our error, this is referred to as a 'change of mind' return.
  • Not all products are eligible for change of mind returns (click here for excluded products).
  • Once you submit a Return Request, we will provide return instructions via email (along with a prepaid return label if applicable). Please wait to receive this before returning any items (Try 2 Anything excluded)
  • Change of mind returns can be resolved by your choice of exchange, full store credit, or a refund. Refunds are subject to a $19.95 admin fee.

For a full overview of our returns and warranty policies, see Returns and Warranties

Help other Wildfire Sports customers shop smarter by writing reviews for products you have purchased.

Write a product review

Others Also Bought

More From This Category