Save $20 with code DOUBLEUP on any two full-priced shorts.

Ten Thousand The world’s best training shorts.


Our workout shorts are the best on the planet, and we’re confident you’ll love them. But to be sure, you can try them free for 30 days at home, in the gym, and on the road. Try them on at home and take them for a spin. If you love them, keep them. If not, send them back within 30 days and you won’t be charged.

We’ve invested in the highest quality fabrics and performance features in order to create the perfect 3 shorts for all the ways you train. You’ll never again have to waste time looking for and trying on tons of shorts just to compromise for something mediocre.  We’re so confident these will be the last workout shorts you’ll wear we want you to take them for a spin on the house before having to buy them.


Take them for a spin in the gym for 30 days...For free.


the shorts

Perfectly designed for every workout


Versatility and mobility to perfectly handle whatever you throw at it.

  • No-pinch, no-bunch waistband
  • Cling-free, ultra-wicking shell for mobility
  • Four-way stretch for max range of motion
  • Available in 7” and 9”, and with or without liner
  • Perfect pocket system for secure storage
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Durability and comfort for every gym session and weekend adventure.

  • Abrasion-resistant fabric for long term durability
  • Two-way stretch for comfort and flexibility
  • Boardshort drawcord for secure fit
  • Perfect pocket system for secure storage
  • 7” inseam


Ultra-light and pared back for a minimalist short that gets out of your way.

  • Stripped down to the essentials for ultra lightness
  • Perforated waistband & lasercut ventilation for max breathability
  • Cling-free, ultra-wicking shell for complete mobility
  • Anti-chafe and anti-odor boxer-brief liner
  • Available in 5” and 7” inseams
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How does the 30-Day In-The-Gym Trial work?

You can try The Interval Short risk-free for 30 days, just pay for shipping upfront. Here’s how it works: build your Interval Short, enter your credit card, and your pair will be on its way. You will not be charged for the shorts unless you decide to keep them. You have 30 days to wear and train in them. If you love the shorts and decide to keep them, you will be charged $62 for the No Liner version, or $68 for the Liner version at the end of 30 days. If you decide the shorts are not for you, you can return them, within the 30 day window, and you will not be charged.

Can I train in the shorts?

First, try them on and make sure they’re the right size. If they’re not perfect, initiate an exchange for the correct size by emailing If they do fit, go ahead and take the tags off and put them to the test in the gym for 30 days.

How do payment and returns work?

You have 30 days from the date you placed your order to decide if you want to keep your Interval Short. If we don’t hear from you within 30 days, we’ll know you love your pair and you’ll receive an email from us with a link to complete your purchase. Returns must be initiated within 30 days from the date you placed your order. Returns under any circumstance will be not accepted after the 30 day period has concluded. At the time you place your order you will be charged $4.99 upfront for shipping anywhere within the U.S.A.

How do I make a return or exchange?

Returns and exchanges are easy. Contact and let us know what you’d like to exchange and what you’d like in its place. Returns must be initiated within 30 days from the date you placed your order. Returns under any circumstance will be not accepted after the 30 day period has concluded.

When does my 30-Day Free Trial start?

Your 30-Day In-The-Gym Trial starts the day you place your order. You’ll have 30 days from then to wear and train in your Interval Short.

How long will shipping take?

Your short will ship within one business day from the date you place your order, and will be delivered within 5-7 business days from the date it ships. Shipping can vary depending on where you’re located. Shipping time does count towards your 30 day try before you buy but we think you’ll have more than enough time to put them to the test.

Is this a subscription?

No, this is a one-time delivery, and you’ll only be charged for the Interval Short if you decide to keep it. You’re always welcome to place orders with us in the future but the 30Day In-The-Gym Trial is a one-time only promotion.

Why can’t I use a coupon with a 30-Day Free Trial?

We believe that our 30-Day In-The-Gym Trial program is more special than any other coupon we can offer. We stand behind The Interval Short 100% and we know you’ll love it so we’re happy to let you try it risk-free.

Are the shorts brand new?

Yes, you’ll receive a brand-new pair with all tags attached.

What happens to the shorts that get returned?

If a used short gets returned after being worn during our 30-Day In-The-Gym Trial program, we'll wash it and recycle it through our One In / One Out program to eliminate waste.