Gregory  Inertia 18 H2O Hydration Pack - 2024 - Men's

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Trekking or traveling? This 18-liter Gregory hydration pack transitions from trail to transit with ease. It has zippered pockets and a reservoir compartment that converts to a small laptop sleeve.

Color: Brick Red
Size: One Size
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Location Image for Inertia 18 H2O Hydration Pack - 2024 - Men's

Features

  • 3D foam on the surface of the back panel creates space for airflow when you're wearing the pack; multilayer construction adds breathable support
  • Perforated shoulder harness provides a comfortable carry; magnetic sternum buckle and hose clip hold the Drylock bite valve on the shoulder harness for easy access to H2O
  • Removable webbing hipbelt offers additional support
  • Includes a 2-liter 3D Hydro reservoir with a patented 3D molded design that works like a reservoir and dries like a water bottle
  • Zippered hydration sleeve features a SpeedClip hydration hanger for single-handed, snap-and-go connection; hydration compartment can double as a sleeve for electronic devices
  • Inline hose quick-disconnect coupling allows for easy refills without having to unthread the hose from the shoulder harness
  • Top zippered quick-access pocket with key clip; side zippered pocket; side mesh water bottle pocket
  • Reflective attachment loops; adjustable trekking pole attachment system
  • Custom ComfortGrip molded zipper pulls
  • Gregory offers a lifetime guarantee on this product

Imported.

View all Gregory Daypacks

Technical Specs

Best Use

Hiking

Frame Type

Frameless

Gear Capacity (L)

18 liters

Gear Capacity (cu. in.)

1,098 cubic inches

Reservoir Compatible

Yes

Reservoir Included

Yes

Bottle(s) Included

None

Liquid Capacity (L)

2 liters

Liquid Capacity (fl. oz.)

64 fluid ounces

Weight

1 lb. 3.5 oz.

Fits Torso Length (in.)

16-21 inches

Fits Waist/Hips

28-48 inches

Material(s)

Nylon

Pack Access

Panel

Number of Exterior Pockets

3 + main compartment

Hipbelt

Yes

Bite Valve Shut-off Switch

Yes

Raincover Included

No

Dimensions

19 x 10 x 8 inches

Gender

Men's

Sustainability

Contains recycled materials

Buying Advice

Reviews
2 reviews with an average rating of 3.5 out of 5 stars

Ratings Snapshot

Product Rating

1 out of 2 (50%) reviewers recommend this product

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Robert
Received free product
Phoenix, AZ
Rated 2.0 out of 5 stars

Solid backpack with design flaws on water delivery

3 years ago

At first glance I thought this hydration pack would be an improvement on the one I’ve been using the past couple years. The backpack itself is roomy and well designed. I stuffed a 7.5-inch yoga mat into it (it sticks out the top, of course, but that gives you a sense of the storage room). There’s an additional small zippered pouch at the top, and a mesh pocket on the left side that can hold t-shirt or a small towel, and a zippered pocket on the right side that fits a large phone and keys. Excellent zipper pulls. Durable setup all around. But this is a hydration pack, so I’ll focus on that aspect. Great design on the reservoir (bladder) itself. It is really easy to remove, fill and replace (which is not true of some competing models). The hose can be easily disconnected from the reservoir, which is handy. There’s a nifty interior hanger in the backpack, so the reservoir does not just slumped at the bottom. When empty and open, the reservoir doesn’t flatten out, so that the inside can dry. The reservoir holds 2 liters — adequate for relatively shorter workouts and/or cooler days. My other water pack holds 3 liters, and while I don’t always fill it, there have been times when I need 3. The backpack is plenty big enough to hold a 3-liter reservoir, so I wonder why they chose to limit it to 2 liters. There are three design flaws with the water-delivery system. 1. The mouthpiece has a magnet that’s supposed to stick to a corresponding small one on the chest-strap buckle. When the hose emerges from the right side, the angle does not allow the magnet to stick. I tried many times and the force of the curved hose pulls it off immediately, every time. If the hose is switched to emerge from the left side, the magnet sticks, but the connection is weak and it dislodges easily. 2. The hose is too short to use from the right side. Given that the magnet does not work, you can instead clip the hose into a front clip (which exists on the right side only), but in that configuration, I had to crane my neck forward and to the side to get a drink from the remaining short bit of hose. If you don’t use the front clip, the hose is long enough, but now it hangs free unless, as a workaround, you stuff it up under the chest strap. However, in this configuration, given the angle that the hose exits the backpack behind your neck, the hose wraps around the outside of the shoulder, at the top of the bicep. It’s functional, but annoying. All this is avoided if you bring the hose out from the left side, so consider this a preference. 3. The mouthpiece has a 90-degree bend, so it must be turned the right way to get it in your mouth. This isn’t hard, and no big deal when hiking. But when biking, it can require a little blind fumbling, an extra frustration compared to one that goes straight in. I tried twisting the hose every which way upon attaching it to the reservoir, to change the default angle, and still had to muss with it each time I wanted a drink. Bottom line: This is a well-built backpack with some clever design elements, but it has serious flaws with its primary function, at least for bikers — fix those, and this would be a 5-star product worth the price. As is, I definitely would not recommend it for biking. Hikers might find the flaws less annoying and appreciate the roomy main compartment and handy pockets.

Age:55–64
Weight:150–175 lbs.
Height:5'11"
No, I do not recommend this product

Overall Fit Rating

Runs SmallRuns Large

Ease of Use

Difficult to useVery easy to use
Helpful?
coder005
Received free product
baltimore md
Rated 5.0 out of 5 stars

Perfect for the commute and the Weekend adventures

3 years ago

Great pack, initially felt stiff, now that it's broken in and been roughed around the city and the back of the truck for a few weekends, fits much better. I use this for a bike commute to work, enough room to put a change of clothes in, water bottle and a little bit of food for the day, the added bonus of hydration bladder is great for the commute to and from and not have to worry with a water bottle.

Age:35–44
Weight:125–150 lbs.
Height:5'7"
Yes , I recommend this product

Overall Fit Rating

Runs SmallRuns Large

Ease of Use

Difficult to useVery easy to use
Helpful?

Questions & Answers

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