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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Gregory Zulu 45Big enough for an overnight, light enough for a day hike, the Zulu 45 uses a dynamic FreeFloat suspension, providing comfort in all environments. With an athletic look, full adjustability, and refined materials, we straddled the line between a daypack and overnighter. FEATURES Adjustable torso provides 3. 5"" of adjustment, allowing for a custom fit without compromising support. Gregory's patented FreeFloat dynamic hipbelt links the hipbelt to the
Big enough for an overnight, light enough for a day hike, the Zulu 45 uses a dynamic FreeFloat suspension, providing comfort in all environments. With an athletic look, full adjustability, and refined materials, we straddled the line between a daypack and overnighter.
- Adjustable torso provides 3.5"" of adjustment, allowing for a custom fit without compromising support.
- Gregory's patented FreeFloat dynamic hipbelt links the hipbelt to the frame with a panel designed to move and flex with your body.
- 3D hipbelt design conforms to the shape of your body, seamlessly providing the padding and support needed to carry heavy loads.
- Full-length tensioned mesh creates space between your back and the pack to allow for heat to escape and air to flow freely to cool you down.
- Designed around the architectural principles of tension and compression, the perimeter frame provides stable, yet flexible support to comfortably carry the load on your back.
- Extra large hipbelt pockets provide secure, easy to access to the essentials you want at your beck and call.
- Constructed from Lifespan foam to provide a generations worth of comfort, the shoulder harnesses are perforated to maximize airflow and comfort on the trail.
- Main U-Zip opening for open access to the main compartment.
- Hydration sleeve with SpeedClip hydration hanger, compatible with Gregory's 3D Hydro reservoirs (reservoir not included).
- Top zippered pocket with reflective attachment points, key clip, and internal zippered security pocket.
- Dual side stretch mesh pockets with pass-through for over or under compression.
- Front stretch mesh pocket with durable fabric front panel and secure buckle closure.
- Adjustable attachment loop and upper shock lock for trekking poles or an ice axe.
- Custom ComfortGrip molded zipper pulls.
| Ideal Fit For | Men |
| Activity | Hiking / Backpacking |
| Internal Frame | Yes |
| Frame Type | Perimeter wire |
| Suspension Technology | FREEFLOAT |
| Compartment Access | Top / U-Zip |
| Closure Type | Drawcord / Zipper |
| Number of External Pockets | 5 |
| Hydration Compatible | Yes |
| Hipbelt Included | Yes |
| Hipbelt Pockets | Yes |
| Trekking Pole Attachment | Yes |
Small/Medium
| Adjustable Torso | Yes |
| Fits Torso | 15" - 19" / 38.1 - 48.3 cm |
| Fits Hips / Waist | 25" - 48" /63.5 - 121.9 cm |
| Weight | 3.45 lbs / 1.56 kg |
| Volume | 43 L / 2624 cu in. |
| Max Carry Weight | 40 lbs / 18.1 kg |
| Packed Dimensions | 25" x 12.75" x 12.5" / 63.5 x 32.4 x 31.8 cm |
Medium/Large
| Adjustable Torso | Yes |
| Fits Torso | 18" - 22" / 45.7 - 55.9 cm |
| Fits Hips / Waist | 27" - 53" / 68.5 - 134.2 cm |
| Weight | 3.7 lbs /1.68 kg |
| Volume | 45 L / 2746 cu in. |
| Max Carry Weight | 40 lbs / 18.1 kg |
| Packed Dimensions | 26" x 12.75" x 12.5" / 66 x 32.4 x 31.8 cm |
| External Material | 50% Polyester / 50% Nylon |
| Frame Materials | Alloy Steel Frame |
| Pack Body | 40% Recycled 400D Polyester Ripstop with PFC-Free DWR |
| Pack Bottom | 420D Nylon with PFC-Free DWR |
| Lining | 40% Post-consumer Recycled 135D Polyester with PFC-Free DWR |
| Suspension | FREEFLOAT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1026 reviews
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Product Reviews
★★★★★ 5
Whistle away my friend!
Size: 2 Count (Pack of 1), Style: Pack of 2
Love it! My dog loves it! The people at the dog park love it! The whistle is the best thing about these balls but the hard durable rubber and the denseness of the ball really make it fly. Let me quickly breakdown each of these:
First the sound is like a...well, whistle coming from a human but oscillating and slightly different. It helps the dogs track where it goes and helps them find it better when it is getting dark (while flying of course, not when it is stationary). It barely makes a sound when throwing it with the wind but really howls when throwing it into the wind. This is why you get this ball and most everyone at the dog park perks up and wonders what that is, asks about it, and thinks it is very cool; which it is!
Next is the durable rubber which doesn't have a single bite mark or split yet in 4 months of constant daily play for about 1 1/2 hours every day! The dog chews it as he brings it back and other dogs steal the ball and run with it while "killing" it perpetually and it has held up great. I don't claim this is going to be Kong ball durable but it is very well chosen rubber.
Last is the denseness of the ball which really makes to go far in a chuckit launcher. One doesn't really notice how far this goes until going back to a tennis ball and realizing how short a tennis ball goes compared to this. The whistler ball, and presumably other chuckit rubber balls (glow, irregular bounce), go 30-40% farther when I throw then using the longest chuckit thrower. This is excellent and wears my retriever out even faster; not to mention the rippling muscles he has from sprinting that whole way!
Overall I got both ball several months ago and we started with the blue ball and haven't had to touch the orange one yet. This is his goto ball at the park and it is the most popular ball, bar none, for all the dogs to steal. The bright blue aspect, the rubber aspect, the sound, and exclusivity of it make it coveted by dogs and owners. I might be gushing and glowing over this ball a bit much but I tend to do that when something unexpected ends up being part of your everyday life and blows you away at how wonderful it is.
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Reviewed in the United States on December 20, 2012
★★★★★ 5
Great for dogs that are chewers
Size: 2 Count (Pack of 1), Style: Pack of 2
These are wonderful for our dog. The bright colors help us find them when our dog can't. The size is perfect to play fetch. Our dog will chew on it a bit and it stays together and does not fall apart. That is a big bonus because our dog is a chewer!
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Reviewed in the United States on February 4, 2026
★★★★★ 5
It's A Whistler!
Size: Medium (Pack of 1), Style: Pack of 1
This Chuckit! Whistler Ball is basically a regular fetch toy that decided to become an annoying little teakettle mid-air. My dog goes absolutely nuts for it—every throw sounds like a tiny referee is shrieking "foul!" the whole way across the yard. He chases it harder than he chases the mailman, and bonus: I can actually find it in tall grass because it's screaming for help. Super bouncy, tough enough that he hasn't destroyed it yet (miracle), and now our walks sound like a low-budget horror movie.
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Reviewed in the United States on February 14, 2026
★★★★★ 4
Great buy
Size: 2 Count (Pack of 1), Style: Pack of 2
Easy to track balls. My dog loves them and I like that they whistle when you throw them cause some times my dog loses track of it in the air. This helps because they can hear where it's going. Will buy again.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
My Dog's Favorite Balls
Size: 2 Count (Pack of 1), Style: Pack of 2
My dogs love these balls and won't play with any others. My lab has to carry the orange ball and track and retrieve the blue one. We have a system!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
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