Picture yourself running. Your hands naturally swing by your thorax making it very very convenient to store and retrieve small personal items in the two subpectoral pockets without any impact on your running form. No need to stop or modify your gait to securely store a car key your friend just handed to you or to retrieve a gel.

The Thoracic Belt has a gentle stretch (retraction force) which locks all items in place. Nothing moves. No bouncing is possible and the retraction force is calculated to be soft enough to not affect breathing.

The right pocket has three mini-slots to put away loose coins, a key, lip balm stick, or maybe a beautiful shell you pick up during your morning run so they do not rattle during your peaceful run!


The Fidlock system combines two fastening concepts in one: a magnetic snap and a mechanical lock that clips tightly around 1 of 3 positions, offering useful adjustments while on the run.

Fidlock truly revolutionizes traditional fastening systems.


Cell phones are important for security, communication, music, orientation and training logs (apps). They're so essential, 91% of runners never leave without.

Cell phones are expensive, what if it rains? FITLY's Phone Slot is exactly designed to host and protect your cell phone with two significant advantages:

-Your mobile is locked into place in a pouch that sticks to your body, follows its every move so bouncing is impossible.

- FITLY Is water resistant. Your phone is protected from the toughest weather.

Some models do not come with a plastic window or a drawing mechanism.


Drizzle or pour, the PU-coated Cordura fabric is water-resistant. It does not make FITLY waterproof but resistant to endure the toughest weather!

The phone slot brings additional moisture protection to the phone. A fully waterproof liner separates your back from the pocketsmaking it impossible for sweat to affect the pockets' contents.

No need to time the weather, postpone a work-out or try to outrun the oncoming storm. No need for a plastic bag either! Just keep on running and know your valuables are protected.


Constructed using high tenacity military-grade fiber technologies, the  fabric is exceptionally durable and puncture resistant.

Our prototypes have been used hundreds of time, under heavy rain, and gallons of sweat with no sign of deterioration. The fabric is "best in class", used in high-end mountain guide equipment, made to endure the toughest weather.



S. Café ® is an eco-friendly (Cradle to Cradle certified) soft fabric that combines nylon yarns and recycled ground coffee at the cellular level. The fascinating benefit is natural odor resistance.Green innovation is a win-win! The S.Café® fabric also naturally cools your skin temperature down!

Sweat, drizzle, pouring rain, FITLY’s 200% UltraWick is a techno-fabric that drains moisture and leaves you dry. So soft, wear it on your bare skin!

Run, sweat, rinse, hang... and repeat!


FITLY is equipped with YKK special noise-free zipper tabs. The tabs cannot move when you run so annoying ticking noise are impossible.

Just what you need multi-COMPARTMENTS

One large pocket for your phone and a larger compartment to store all kinds of stuffs (21x13 in).

Two medium pockets on the back to store keys, additional gels, credit cards, ID, cash, etc (12x8 in and 13x1 in).

A clever "secret" Side pocket with a vertical zip to store your most valuable items as well as hydration up to 400 ml if needed (17x13 in).

All are rain and sweat resistant.


FITLY has five easy adjustments to make it your own:

Two bilateral straps adjustments to lower the belt (up and down) so it is correctly positioned below the pectoral muscles.

Two bilateral thoracic belt adjustments to reach sizes varying from 67 cm (XS) to 105 cm (XL). Your band size is calculated below the pectoral muscles/breasts (same as a cardio or the bottom portion of a bra (band).

The fifth adjustment is the three-pronged Fidlock Fastening System (see above) with 2.5 cm micro-adjustments at the front of the belt, useful while running.

How to measure


Front and back safety reflective bands as well as silver reflective logos for your night adventures. See and be seen!

Also available is a 5 cm long webbing to attach an additional light. It is especially important for bikers on an early morning ride.

Trivial but important, we placed a mini whistle directly in the front pocket so it can be immediately accessed.

Your headphone cable (if you still us one) is routed through the cable slot and special webbings on the straps so loose cables do not dangle.

Disclaimer: the above pictures of the Sub45 do not always reflect small adjustments or improvements we sometimes make to to the product. They are for your information only.

Find the right band size