Gregory 3D Hydro 3L Reservoir Optic Blue — Low-Profile Hydration Bladder with QuickDry

The Gregory 3D Hydro 3L Reservoir is a 3-liter hydration bladder engineered to sit flat against your back, dry quickly, and connect easily to Gregory packs for secure, comfortable on-trail hydration.

Built for hikers, trail runners and all-day pack users, this Optic Blue reservoir blends low-profile anatomy with practical features that speed drying, simplify storage and make filling and mounting straightforward. Instead of a bulky cylinder, the 3D Hydro uses a flat, contoured shape and interior baffle to keep weight spread evenly and reduce bounce. It also integrates drying and hanging solutions so you spend less time fussing with care and more time moving.

How does the 3D shape improve comfort on long hikes?

The reservoir’s 3D form and full-length internal baffle flatten water against your back, lowering the center of gravity and preventing roll as you move. That even weight distribution reduces shoulder strain and improves pack stability on technical terrain.

• Flat, anatomical profile keeps liquid close to your spine for balance
• Internal full-length baffle prevents sloshing and maintains shape
• Reduced cylindrical bulk fits slim hydration sleeves better

What makes drying and storage faster when I return from the trail?

This bladder includes a soft-molded 3D QuickDry design that keeps the two main layers separated when open, allowing air to circulate and dry the interior quickly. An integrated QuickDry hanger lets you suspend the reservoir to finish drying without extra hardware.

• 3D QuickDry prevents layer collapse for efficient airflow
• Built-in hanger supports convenient off-pack drying
• Faster drying reduces risk of odors and makes maintenance easier

How does it attach to Gregory packs and stay secure while moving?

Gregory’s SpeedClip mounting system pairs with the reservoir’s hanger for one-handed attachment and removal. The linkage locks in place inside compatible Gregory hydration sleeves, so the bladder won’t shift during moves or technical sections.

• SpeedClip offers quick lock-and-go connection inside hydration sleeve
• One-handed attachment simplifies on-the-go setup and removal
• Co-molded baseplate supports stable placement inside the pack

How easy is filling and carrying the 3D Hydro?

A soft-molded spine handle and co-molded baseplate make filling, carrying and packing straightforward. The handle provides a comfortable grip while the reinforced base helps guide the reservoir into and out of the sleeve without folding or catching.

• Spine-molded handle is comfortable for filling and transport
• Co-molded baseplate prevents sagging and eases insertion/removal
• Lightweight construction adds capacity without extra bulk

Who this is for: Outdoor enthusiasts who prioritize reliable hydration without extra weight or bulk will appreciate the Gregory 3D Hydro 3L Reservoir. It suits day hikers, multi-day trek packers and trail runners who use Gregory packs or any hydration sleeve compatible with flat-form bladders. Choose the Optic Blue color for high visibility and straightforward integration with most pack systems.