Hydra25L
A fully welded dry pack for water, weather and the days you can’t plan for. Everything inside stays dry. Everything you need stays reachable.
Fig. 01 · Hydra
Fig. 02 · Hydra
Fig. 03 · Hydra
Fig. 04 · Hydra
Fig. 05 · Hydra
Fig. 06 · Hydra
Fig. 07 · Hydra
Overview
25L Roll-Top Backpack
For days that don't stay dry.
Hydra is a 25-liter backpack built around an RF-welded 420D shell, with a roll-top opening that secures in two configurations. Buckle it across the top or cinch it down at the sides to suit what you've packed.
Closure
A lighter day and a fuller pack need different amounts of space. Hydra's roll-top lets you adjust the closure around changing contents, while the two buckle configurations give you flexibility in how you secure the bag.
Connect the roll-top ends across the top, or use the side buckles to draw the closure down. UTX Duraflex hardware secures either arrangement. Packing volume varies with how far you roll the opening and how you fasten it.
Construction
Hydra uses RF welding to join its 420D shell panels without stitching through those seams. The welded construction and roll-top format make protection from wet conditions central to the bag's design.
Twin external daisy chains and side D-rings provide attachment points for compatible accessories. The restrained exterior works across rainy commutes, outdoor trips, and everyday travel.
Core-01
Hydra accommodates CORE-01, allowing you to carry your organized emergency equipment alongside personal essentials. Move the panel into the pack, add what the day requires, and adjust the closure around the contents.
Key features
- Nominal 25-liter capacity.
- RF-welded 420D shell.
- Roll-top opening with top-buckle and side-buckle closures.
- Adjustable closure to accommodate different packing volumes.
- UTX Duraflex hardware.
- Twin external daisy chains and side D-rings.
- Designed to accommodate CORE-01.
Specifications
FitCore-01 panel, 11 × 18 in.
Shell, closure, size, weightIn the spec sheet further down this page, per pack.
HardwareYKK zips, UTX buckles, glove-friendly pulls.
CoatingsC0, PFAS-free.
Shipping, returns and warranty
ShippingIn-stock orders ship within 1–3 business days from the USA, worldwide. Tracking by email.
ReturnsUnopened items within 30 days, any reason.
WarrantyVanguard lifetime warranty against defects in materials and workmanship. If it fails in normal use, we repair or replace it.
Thirty seconds in the field.
No voiceover. Just the pack doing what it is for.
Welded, not sewn.
Every seam is RF-welded so there is no needle hole for water to find. Roll the top three times and the whole bag is a dry bag.
One compartment, no digging.
A wide roll-top mouth and a rigid back wall keep the load upright, so what you packed first is not what you reach last.
Sits high, stays put.
Contoured shoulder straps and a low-profile hip belt for water crossings, wet decks and long wet walks.
The numbers.
Measured, not marketed. Every figure here is checked against the production sample.
Built forthe far side.
Water is
the enemy.
Fig. 03 · Fjallsárlón, IcelandBuilt for water
RF-welded seams and a roll-top closure. No stitching for water to find. It rides in the trunk, on the deck, on the ice, and stays dry inside.
Welded,
not sewn.
Fig. 04 · Djúpavík, IcelandThe panel fits
Core-01 latches into the same 11 × 18 footprint as every pack. Lift it out, drop it in, nothing repacked.
Carried, not stored.
In their
words.
New. No reviews on this one yet.
Own one? Say how it went.
Built around
Core-01.
One rigid core. Sealed modules. Hydra is one of three packs built around it.
Explore Core-01from $199Everything else.
Questions and policies, for when you want to check before you buy.
FAQCommon questions+
Is it waterproof? See the spec table for each pack’s rating. Hydra is fully welded; Sentry and Fury are weather-resistant with water-resistant zippers.
Will a laptop fit? Sentry and Fury carry a 16-inch laptop in a padded sleeve. Hydra has no sleeve.
Does it work with Core-01? Yes. Any of the three takes the Core-01 panel, sold separately.