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Built For Athletes x ZONE3 45L Transition Backpack
Built For Athletes x ZONE3 45L Transition Backpack with dual water bottle holders.
BFA Backpack
Built For Athletes x ZONE3 45L Transition Backpack showcasing sleek design and water bottle holder
Built For Athletes x ZONE3 45L Transition Backpack with water bottle holders and adjustable straps.
Built For Athletes x ZONE3 45L Transition Backpack open view showing compartments and gear storage.
Collection of Zone3 triathlon gear including wetsuits, helmet, backpack, and accessories on a white background.
Built For Athletes x ZONE3 45L Transition Backpack open with pockets and bag patch.
Built For Athletes x ZONE3 45L Transition Backpack worn by a triathlete in outdoor setting.
Built For Athletes x ZONE3 45L Transition Backpack worn by a triathlete outdoors.
Built For Athletes x ZONE3 45L Transition Backpack interior view showing spacious compartments.
Built For Athletes x ZONE3 45L Transition Backpack interior view with dedicated laptop sleeve and organizer pockets.
Built For Athletes x ZONE3 45L Transition Backpack side view showcasing pocket and straps.
Built For Athletes x ZONE3 45L Transition Backpack open, showcasing storage for gear and essentials.
Built For Athletes x ZONE3 45L Transition Backpack with helmet and water bottle compartments.
Built For Athletes x ZONE3 45L Transition Backpack

3 reviews

Built For Athletes x ZONE3 45L Transition Backpack

Engineered for triathletes and multi-sport athletes, this 45L transition backpack is designed to keep pace with your swim, bike, and run routine.
£139.99
Full Description
Delivery & Refunds
Delivery & Refunds

UK

  • DPD Pick Up Service (UK mainland only) - £3.95
  • Standard: £4.25 / Free for orders over £175.
  • Next Working Day: £6.95 or £4.95 for orders over £175 (order by 2:45pm, Mon–Fri, excludes Weekends and Bank Holidays).
  • Guernsey, Isle of Man & Jersey: £7.95 / €9.95 (free for orders over £175 / €175).

EU

  • Shipping costs calculated at checkout (import fees apply).

Germany

  • Standard: €10.95 / Free for orders over €175. 

Ireland

  • Standard: €12.95 / Free for orders over €175. 

US

  • Free for orders over $250. Shipping costs calculated at checkout (import fees apply).

Rest of the World

  • Shipping costs calculated at checkout

Returns: Accepted within 30 days. Not applicable for Ex-Demo products.

For more information, click here.
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Performance proven

Built For Athletes x ZONE3 45L Transition Backpack

Complete with Built For Athletes Bag Patches

Crafted from ultra-durable 900D polyester with a stain-resistant coating and rip-proof strength, it’s built to endure daily training demands. Premium YKK® Japanese zippers ensure lasting reliability across every
compartment, while the smart storage system makes it easy to organize your kit.

With space for your wetsuit, cycling shoes, running gear, nutrition, and more, it eliminates the need for multiple bags.

Whether you’re heading to the pool before work, transitioning to a ride, or tackling a brick session, this backpack delivers one-bag convenience for every discipline.

Key Features

  1. Smart storage capacity: Easily fits 2 pairs of trainers,
    towel, gym clothes, meal prep, small training tools, and
    more.
  2. Ventilated base compartment: Dedicated shoe storage for keeping footwear separate.​
  3. Large upper & lower pockets: Designed for your cycling helmet and wetsuit/kit.​
  4. Laptop/device section: Padded compartment fits devices up to 17".​
  5. Bottle holders: Dual side pockets fit a 1000ml protein
    shaker and 1000ml water bottle.​
  6. Flat-pack design: Backpack opens 180° for easy
    packing/unpacking.​
  7. Two-way zippers: Quick access across all compartments.
  8. Ergonomic comfort: Adjustable sternum, waist, and
    compression straps with hook-and-loop ties for secure
    carrying.​
  9. Load tested: Strong enough to carry 20kg+ / 44lb+.​
  10. Patch-ready design: Large hook-and-loop section on the front, plus extra sections on both sides, with a Built
    For Athletes patch included.​
  11. Laser-cut MOLLE construction: Clean, modern aesthetic.
  12. Durability:
    - 900D Polyester fabric​

    - Rip-proof and stain-resistant coating​

    Dimensions:
    48cm (H) x 34cm (W) x 32cm (D)

Overall rating: 5.0 / 5 from 3 reviews.

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Review highlights

Reviews

Roomy bag - lots of pockets for great organisation

"This bag is really well set up for organising your kit. I use it for my open water swimming gear and it’s handy to be able to separate my pre and post swim stuff. It feels really sturdy and is comfortable to wear and carry, even when packed fully of heavy stuff. Outside bottle carriers and a wet kit section are also very welcome."

— Sue W. (5/5)

Not cheap if you assume

"Not cheap if you assume it is just a rucksack, but it isn’t just a rucksack it is a work station for your kit. Great pockets, zips and bottle/ gel pockets plus plenty of room for organised kit for example keeping wet from dry or used from clean etc. worth the price and very nicely made"

— Paul H. (5/5)

Transition Bag

"Excellent bag. Good size and holds everything. More than enough space for everything. Bottom compartment fits both cycling and running shoes. Top compartment for helmet and plenty of storage inside for wetsuit etc. Very pleased with it."

— Dave K. (5/5)

Q&A

Description
£139.99