Gregory  Nano 18 H2O Hydration Pack - 2024

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This Gregory hydration pack is a handy companion for a busy weekend, spontaneous hike or music festival. It hauls all of your must-haves—and 3 liters of water—when you're out and about.

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Features

  • Included quick-drying Hydro 3-liter reservoir fits in a separate zippered compartment to help you stay hydrated on the move
  • Top zippered pocket with a key clip; zippered side stash pocket; side mesh water bottle pocket
  • Grooved foam back panel allows air to flow freely, keeping your back cooler
  • Padded shoulder straps with a magnetic sternum buckle and integrated hydration routing
  • Easy-pull top drawcord opening lets you quickly and conveniently access your stuff
  • Reflective attachment loops to secure water bottles and other trail accessories
  • Removable webbing hipbelt helps balance your load
  • Padded tubular webbing haul handle adds carrying comfort
  • Custom ComfortGrip molded zipper pulls
  • Designed using the Gregory Lifecycle Analysis tool and using recycled materials to provide a 40% reduction in carbon footprint compared to a conventional nylon pack

Imported.

View the Gregory Nano Product LineView 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)

3 liters

Liquid Capacity (fl. oz.)

101 fluid ounces

Weight

1 lb. 2.4 oz.

Fits Torso Length (in.)

14-19 inches

Fits Waist/Hips

Up to 48 inches

Material(s)

210-denier high-density nylon (40% recycled)/450-denier recycled polyester

BPA Free

Yes

Pack Access

Top

Number of Exterior Pockets

3 + main compartment

Hipbelt

Yes

Bite Valve Shut-off Switch

Yes

Raincover Included

No

Dimensions

19.5 x 10.25 x 6.5 inches

Gender

Unisex

Sustainability

Contains recycled materials

Buying Advice

Reviews
8 reviews with an average rating of 4.1 out of 5 stars

Ratings Snapshot

Product Rating

3 out of 5 (60%) reviewers recommend this product

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Pagosa hiker
Rated 4.0 out of 5 stars

Great value day hiker

1 month ago

Solid construction. The straps are high quality and the waist band is a nice add. The included reservoir did NOT have any plastic taste to the water. Durable materials. The only other thing that would be a nice add would be a few organizational features in the lid. Otherwise, it's a great day hiking, lightweight pack!

Helpful?
Bra Wearer
Boulder, CO
Rated 4.0 out of 5 stars

Big pack, really big water pouch!!

4 weeks ago

For day hikes under 10 mi when it’s not hot out, everything about this pack is way too much. My rule of thumb is one litre per person per five miles when it’s hot and dry, so this is great for longer hikes and also single-night overnights. The 18L backpack pocket parts are big enough for a change of clothes, food, and a few essentials. The top / lid pouch is a great size for stuff you’d want to grab quickly without digging, like a lighter. As a smaller woman this bag is longer top to tail than I’d like as its end hits the top of my glutes, and the chest strap is completely unusable as it is right over the nips, but the over the shoulder straps are very comfy when adjusted well. There’s also a lightweight hip strap which could be helpful if the whole pack was full!

Age:35–44
No, I do not recommend this product
Helpful?
melly mel
Los angeles
Rated 5.0 out of 5 stars

great daypack at an even greater price

1 month ago

I love that this day pack comes with a hydration bladder. It works well and I added some cordage on the outside using the daisy chain looking things in case I wanted to carry something wet.

Age:25–34
Yes , I recommend this product
Helpful?
Lala
NC
Rated 5.0 out of 5 stars

Comfortable and light

1 week ago

Not too small not too big. I add bungees outside for attaching sweatshirt/jacket. very good size bladder and easy to refill. Very comfortable shoulder straps, a must for me.

Age:45–54
Helpful?
Sgg
Las Vegas, NV
Rated 5.0 out of 5 stars

Great day hiking pack

1 month ago

The reservoir is easy to remove, fill, and reinsert. Lots of additional storage. Worked great hiking on Mt Charleston near Las Vegas!

Age:35–44
Yes , I recommend this product
Helpful?
MEO
Rated 1.0 out of 5 stars

Gregory Nano 18 H20 Hydration Pack

1 month ago

While I would love to submit a review, this item, scheduled for delivery on 6/12/25, has not yet arrived.

No, I do not recommend this product
Helpful?
Mandy
Rated 5.0 out of 5 stars
1 month ago
Age:35–44
Yes , I recommend this product
Helpful?
Anonymous
Rated 4.0 out of 5 stars
1 month ago
Helpful?

Questions & Answers

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