The products are named based on their running focus. Sub45, for example, is a running pack made for shorter runs; up to 45 minutes, which is the majority of our runs.
Sub45 is the smallest and the thinnest of all three packs. It is entirely designed to provide just enough storage for an everyday run. Although you can carry small hydration flasks, Sub45 has no hydration system built in. Two front pockets, a phone pocket in the back, a secret side pocket, and two smaller pockets in the back are all designed to keep small personal items in check when you run. Sub45 has multiple stretch points to keep the pack on your body, making you feel like you have nothing on.
Sub90 has the same length and width as Sub45 but is 1cm thicker to accommodate a 500ml slim bladder tucked into a thermo pocket. A strat channel hosts a hidden tubing system, and the back pocket is more extensive to fit longer objects. Its construction and stretch points are the same as Sub45.
Sub180 is the largest of the 3. Geared towards longer distances with much more weight capacity. An entirely different pack structure, relying on triangulation and anchor points instead of stretch points to pull weight towards the body. There is more focus on frontal access with a quad pocket, an expandable back, and a much larger bladder (1.1L).
Sub45 is for your everyday short runs at or below the 45-minute mark (the vast majority of runs). Sub90 can take you up to 90 minutes with the included hydration system without weighing you down and Sub180 is for your extended outings up to 180 minutes of action (many use it as a minimalist day pack as well).
Sub45 and Sub90 come in 2 sizes: XS-S and M-L-XL. Measure 2 inches below the pectoral muscles/ band line to find yours. See how to measure here. If you are in between, consider thickness variations (jacket, etc.) between summer and winter runs.
It is worth spending 30 seconds to properly adjust FITLY to your body shape. FITLY was explicitly developed to reach a very high comfort level. If your FITLY is not fitted correctly, you will lose one of its key benefits.
Tip: it should feel snug, not tight.
You go through a lot when you run. Your zippers, too! With proper maintenance, they’ll perform for decades. Without it, they may lock up. Read the blog that explains how to care for your zippers. You’ll be thankful you did!
Wash with mild soap. Rinse with lukewarm water. Many runners take FITLY with them in the shower post-workout, rinse, and hang upside down top dry. Do not use your washing machine; it will rub off the water-resistant coating. Insert some paper towels in the pockets to speed the drying process up if you need to.
In all cases, rinse all flasks/ladders thoroughly before the first use. Dissolve some baking sodas and soak for 15 min if you experience a taste in the liquid.
Tip: Dry the flask upside down. Insert a wooden spoon (or similar object) to enable air circulation inside the flask.
Your flow stop is probably on, preventing the liquid from passing through. Please watch this quick video explaining what to do: FLOW STOP
Also, if you insert the tube too far inside the flask, the TPU can block the flow.
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-F1 fits in the front pockets of all FITLY, except the Sub90 XS-S when filled.
-F2, F3, F4, and F5L fit in the back pockets of any FITLY and the upper front pocket of the Sub180.
-F5 and F5B come with every Sub90 and fit in the custom-made thermo-pocket. F5 and F5B do not fit in the Sub45
-F11 and F11B come with every Sub180 and fits right in the custom made thermo-pocket. F11 and F11B do not fit in the Sub90 nor the Sub45
-F17 and F17B are standalone bladders to use with your pack. They also fit the Sub180.
You could use any flask with the tubing system, as they all share the same system. Note that the Sub45 is designed structurally to hold a certain weight. If you overpack, you may experience some bouncing at the straps level.
Always RINSE before first use. Mix a teaspoon of BAKING SODA with lukewarm water, let soak for 15 minutes, and rinse.
Users have also found the following to be helpful:
Note: TPU material has been used in millions of products for decades. Our flasks passed the Sensorial Examination for Odor and Taste (Robinson’s test) with a 0/2.5, indicating “no perceptible odor.” In other words, no particle transfer can be found in the liquid after 5 hours at 50°C/122°F.