Sierra Designs 3-6L Flex Lumbar Waist Hydration Pack
SKU: 18868950802

Sierra Designs 3-6L Flex Lumbar Waist Hydration Pack

Sale price$146.70 Regular price$163.00
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Sierra Designs 3-6L Flex Lumbar Waist Hydration PackThe Flex Lumbar 3L 6L Backpack Bag Small yet mighty, the Flex Lumbar 3 6 pack from Sierra Designs is designed to lighten your load by shifting weight from your back to your backside. Ideal for day hikes, bike rides, and casual outings, this hip sized pack is a compact version of the Flex Capacitor backpack. The innovative expanding gusset allows for flexible carrying capacity, enabling you to adjust the pack to accommodate bulky layers, snacks, and

The Flex Lumbar 3L-6L Backpack Bag

Small yet mighty, the Flex Lumbar 3-6 pack from Sierra Designs is designed to lighten your load by shifting weight from your back to your backside. Ideal for day hikes, bike rides, and casual outings, this hip-sized pack is a compact version of the Flex Capacitor backpack. The innovative expanding gusset allows for flexible carrying capacity, enabling you to adjust the pack to accommodate bulky layers, snacks, and trail essentials. With two elastic mesh pockets for water bottles and plush padding on the hip belt straps, this low-back pack offers comfort and stability for various body shapes.

Key features of the Flex Lumbar 3L-6L Backpack Bag include stretch mesh water bottle pockets, a zippered valuables pocket, a main compartment with a hidden top zipper, and vertically expandable volume. The pack is equipped with dual compression straps to secure the load and a padded hip belt for on-trail comfort.

Specifications:

  • Capacity: 3-6 litres
  • Weight: 0.23 kg
  • Hip fit: Up to 132 cm
  • Dimensions (H x W x D): 15.2 x 25.4 x 12.7 cm
  • SKU: 80711520PT

Elevate your outdoor adventures with the versatile and ergonomic Flex Lumbar 3L-6L Backpack Bag from Sierra Designs. Whether you're exploring the trails or enjoying a leisurely bike ride, this pack offers the perfect blend of functionality and comfort. Gear up and experience the convenience of hands-free carrying with this innovative backpack.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 18868950802

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AZR2nut
Waukegan, US
★★★★★ 5
This Stuff Turned My Morning into a Rocket Launch – No Crash, Just Pure Chaos!
Flavor Name: Zero Ultra, Size: 16 Ounce (Pack of 24), Flavor Name: Zero Ultra, Size: 16 Ounce (Pack of 24)
I popped open my first can of this sparkling energy elixir expecting the usual lukewarm disappointment, but instead, it hit like a caffeinated unicorn tap-dancing on my taste buds. The flavor is ridiculously good – think tropical punch meets crisp citrus without that artificial "why did I do this" aftertaste. It's completely sugar-free, so no sneaky crash later, yet the carbonation is perfectly balanced: fizzy enough to feel exciting, but not so aggressive it turns your esophagus into a launchpad. Digestibility? Flawless. My stomach thanked me instead of staging a protest, which is a miracle for someone who once considered coffee a food group. As for effectiveness, this bad boy delivers exactly what it promises and then some. The caffeine content is spot-on potent – enough to power through a soul-crushing workday or an impromptu home renovation project without the jitters or heart palpitations that usually come with high-octane drinks. I tackled my to-do list like a caffeinated superhero, all while staying hydrated and focused. Five stars for turning a regular Tuesday into an epic quest. If you're looking for clean, bubbly motivation in a can, stop scrolling and add this to your cart immediately. Your future self will high-five you.
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Reviewed in the United States on May 13, 2026
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Verified Purchase
Veronica Martinez
Draper, US
★★★★★ 5
Great taste without the sugar crash
Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)
I picked this up because I wanted an energy drink that wouldn’t be loaded with sugar, and this one honestly surprised me. The flavor is really light and refreshing—not too sweet or overpowering like some other energy drinks. I’ve been using it mainly in the mornings or when I need a quick boost, and it definitely helps with energy and focus without making me feel jittery. One thing I really like is that there’s no heavy aftertaste, which I’ve noticed with other sugar-free drinks. Pros: Zero sugar but still tastes good Smooth, not too strong or artificial Gives a noticeable energy boost Cons: Might be a little too mild if you like very strong flavors The price can add up if you drink them often Overall: I’d recommend this if you want a cleaner-tasting energy drink without all the sugar. It’s easy to drink and does what it’s supposed to.
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Reviewed in the United States on April 3, 2026
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haley
Belleville, US
★★★★★ 5
Great!
Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)
Great price for this pack, saves money in the long run! The flavor is great and love the carbonation. The sugar free flavor is my favorite.
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Reviewed in the United States on May 28, 2026
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Timothy B. Elliott
Lowell, US
★★★★★ 5
My go-to energy drink for years, no crashes or headaches
Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)
Consistent energy, good taste, and no weird side effects ✔️ Sugar-free with no crash ✔️ No headaches or jittery feeling ✔️ Clean, smooth energy boost ✔️ Good flavor without being overly sweet ✔️ Reliable enough for long-term daily use ✔️ Subscription makes it easy to keep stocked I’ve been buying Monster Zero Ultra for years and have it on subscription. It’s the one energy drink I consistently go back to. I've tried most others and they all leave me feeling weird. I actually feel a noticeable energy boost from it, but without the downsides I’ve had with other drinks. No headaches, no weird jittery feeling, and no crash later on. The flavor is also solid (this one and Ultra Violet are my go tos') , not overly sweet, and easy to drink regularly. I only buy sugar-free energy drinks, and this checks that box without sacrificing taste. I limit myself to one a day after the gym and water the rest of the day. After trying a lot of different brands, this is the one that’s stayed consistent for me, which is why I’ve kept it on subscription.
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Reviewed in the United States on April 5, 2026
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Laurin
Pawtucket, US
★★★★★ 5
Monster
Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)
Great price. Cheaper than the store. Zero sugar is a game changer!
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Reviewed in the United States on May 15, 2026

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