Let's be real. You don't need another piece of gym kit gathering dust—or to invest in a million different options. That's why we've created a multi-tasking hero you'll reach for (or throw, or curl, or squat), again and again.
One sandbag, four adjustable weights = limitless workouts. From your living room to the park, The55 makes functional fitness ridiculously simple. Here's the full story behind our innovative design.
SKIP TO THE GOOD PART
Before we get into the BTS, here's what you need to know about our weighted sandbag:
Fill it with sand, rocks, or water bottles for a custom load, or grab our pre-filled 40lb sandbag (complete with 4 x 10lb inserts), ready to train right out of the box.
It's a gym in a bag that works as hard as you do.
Unfilled = load up with your own weight
Prefilled = Ready out the box with 4 x weights options (10, 20, 30 & 40lbs)
THE ULTRA-CUSTOM
The ultra-custom functional training tool for serious flexibility. Fill it yourself with sand, rocks, or gravel to create the perfect weight, and pack it up easily to take your workout to-go.
TAKE ME HOME
THE SIGNATURE
Our best seller, ready to go. This prefilled sandbag comes with 4 adjustable inserts, so you can train at a weight that works for you including 10, 20, 30 & 40lbs – straight out of the box.
THE ONE YOU WANT
2009 - THE ORIGIN STORY
Our founder, part of the UK military, was deployed in Afghanistan when he spotted a gap in field training equipment.
Inspired by a travel-ready toiletry bag (you know, the one with all the zips), he called in reinforcements: his mum and her sewing machine. Our first prototype? A pillowcase. Yes, really.
2013 - MILITARY MILESTONE
With a few hundred tweaks and a whole lot of testing, that humble pillowcase became "The Battle Bag".
It didn't just make the cut—it smashed it.
Patent-protected and army-approved, over 800+ bags were deployed across military units.
2021 - FIELD TO FUNCTIONAL FITNESS
Then we thought, why should the military have all the fun? After rolling out the Battle Bag in gyms across the UK, we found a new army of followers—functional fitness fans.
That's when The55 was born, bringing the same military-grade durability and all-in-one functionality to the masses.
COMING SOON - LOOKING AHEAD
We're taking The55 beyond the battlefield. Next stops: The World. Ready to train anywhere, anytime.
BEHIND THE NAME: THE55
The55stands for transformation, resilience, and breaking through your own physical and mental limitations.
The 55th meridian east (55°N) crosses the UK, symbolising direction, purposeful movement, and forward progress in training.
The55merges growing strong with staying on course toward realistic, measurable, and ambitious fitness goals — when it matters.
No more messy home gyms. Our bag folds and rolls, to fit in the tightest of spaces (hello, under the bed). Who needs multiple sandbags when one does it all?
That hotel gym? Yeah, it'll be suss. With The55, your functional fitness routine stays on track—wherever you are.
Squats, curls, deadlifts, presses, we can keep going but you'll be here a while. Our sandbag can hit every muscle. Now, the next move is yours.
Cue 30+ functional training workouts (and counting) from our favourite PTs. Plus, everything you need to know to up your training game
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