Free shipping?

Free shipping is standard on all orders. We ship USPS First Class with tracking. 

Expedited delivery is available and is calculated at checkout based on final destination.

Do you ship Internationally?

Unfortunately, we only ship within the US. We are working towards expanding out shipping methods in the future! Drop us a line if you're outside the US and interested in buying a pair: charlie@paretoathletics.com

How long does domestic shipping take?

We try to process your order within 1 business day. 

Our free standard shipping is USPS First Class with tracking. This takes between 2-5 business days to get to your doorstep. 

Returns & Warranty

How we handle returns

60 days from the date of purchase for a full money-back refund + free return shipping. 

You can return your order for any reason.

Contact us at charlie@paretoathletics.com for more info.

Warranty details

We offer a lifetime warranty on every pair sold. If it breaks, we'll replace it for free. 


How to install

Use your shoe's stock insole as a template to trace onto the PR1. 

Before tracing the outline, adjust the PR1 and stock insole so the edge of both heels are aligned.

Using scissors, cut along the outline. Do not cut the hard heel section of the PR1. 

Position the PR1 so it lays flat with the logo facing up inside the shoe. The PR1 should be as far back towards the heel of your shoe as possible.

Rock back on heels to check spring activation. It sensitivity and position of activation should feel identical between feet. Adjust PR1s as necessary to get symmetry. 

Full video install instructions can be found by clicking on the video icon below!


Can I adjust the sensitivity?

We offer two versions of the PR1. The S1 version, designed for athletes under 100lbs, is more sensitive than the S2 version.

The position of the heel assembly can affect the sensitivity of the spring. Every shoe and foot combo is different. The goal is to position the spring underneath the back edge of your heel.

You should be able to roll back on your heels and activate the spring.

A good starting position for the insole is flat across the midsole of the shoe and as far back towards the shoe's heel counter as possible. 

Please do not hesitate to reach out for additional assistance via the contact box below or give us a call at 323.484.8946




Do I need to remove my shoe's stock insole?

It depends.

If your shoe has a thick stock insoles (5mm or more), we recommend placing the PR1 on top of the stock insole.

If the stock insole is less than 5mm, try removing the stock insole and placing the PR1 in its place.

Does the PR1 work with any shoe?

The PR1 can be used with most sport-specific footwear (running, soccer, football, baseball, tennis basketball), minimal footwear, or casual shoes. Not recommended in shoes with a heel drop in excess of 10mm (aka shoes with a large heel).

Why is the insole only available in one size? 

The PR1 main goal is to position the sensor underneath the back of your heel. As the size of a shoe's heel cavity barely increases with shoe size, we are able to cover almost any shoe up to a Women's 15 and Men's 14 US sizes with a single insole template. 

Why is there no arch support in the PR1? 

Arch support is not necessary for most athletes and every foot has a unique arch shape. 

Arch support should only be used under the guidance of a professional as it will dramatically alter the alignment and range of motion of your foot and subsequently your entire kinetic chain.

The PR1's thin flexible design allows the user to fit the PR1 on top of a custom orthotic or arch support if necessary.

More questions?