Momentum Short 2.0 with Liner


in Heather Marine


Momentum Short 2.0 with Liner


in Heather Marine


One short for all the ways you train

Color: Heather Marine Size:Size Unavailable?


Our lightest athletic short is built with quick-drying four-way stretch fabric, a durable water repellent treatment, and a matte finish that looks as great as it feels. Redesigned with deep hand pockets, a hidden zippered back media pocket, and an overlapped side split and gusset for total range of motion during sprints, squats, and sun salutations. Put 'em on and go—the breathable built-in boxer brief is designed for comfort and support without being restrictive.

  • Built-In Breathable Boxer Brief Liner*
  • Four-Way Stretch
  • Durable Water Repellent Treatment
  • Mesh Front Pockets
  • Hidden Media Pocket
  • Overlapped Side Split & Gusset Construction
  • Available in Short 6" and Standard 8" lengths

Made in Shenzhen, China

*Liner Color May Vary

Also available without liner

Fit & Size Guide

Designed with a modern, athletic fit. The built-in liner is supportive without being restrictive. We recommend sizing up if you’re between sizes or prefer a more relaxed fit.

The Standard length has an 8-inch inseam and the Short length has a 6-inch inseam. Both versions have the same dimensions in the leg opening and waist.

See size guide below for details.

Momentum Short 2.0 with Linersize guide

Size Chart
1 Waist 27 – 29 30 – 32 33 – 35 36 – 38 39 – 41
2 Inseam 6 & 8 6 & 8 6 & 8 6 & 8 6 & 8
3 Leg Opening 23 23½ 24 24½ 24¾


  • Most orders are delivered in 3–7 business days. Customers will receive a shipment confirmation email with tracking information within 1-2 business days of of placing their order.
  • International orders are typically delivered in 7-21 business days. For more information, see our Support & FAQ page.
  • When your order is shipped, you will be emailed a FedEx Smart Post or USPS tracking number.


We are decent human beings and we want you totally satisfied with your purchase. If you’re not completely happy with it, you may return or exchange your order within 30 days of receiving the goods for all US and US Military orders. Item(s) must be unwashed and in new condition. (We cannot accept returns and exchanges for international orders.) 

We will replace or repair any item with defects that are not the result of expected wear and tear. If your apparel fails for any reason, send us a note at and we'll get you squared away.

Customer Reviews

Customer Reviews

Based on 42 reviews
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Trey F.
United States


They are great

Chris W.
United States

Great shorts

I like the shorts very much. The feedback I would have is that the drawstring is too short and the zip pocket on the Small size is too small to fit a large phone. The medium size had the same drawstring issue, but the zip pocket was large enough to fit the phone.

Gregory A.
United States

*golf clap*

These shorts are wonderful! I've used them for running, hiking, and swimming. They're comfortable for lounging and they look great too!

Steve G.
United States

Room for Improvement

The general fit and length of these shorts are great for running and time in the gym. However, the elastic waistband leaves something to be desired. I am forced to tie the drawstring very tight (way too tight) to keep the shorts from falling off. I have both the Momentum short, and the Everyday short (Both w/o built in Liner) and the waistband is perfect. The design that includes the liner needs improvement, as the waistband feels like its that of a 5-10 year old short.

C. K.
United States

Great shorts!

I waited a long time before purchasing my first pair of Myles shorts. The sponsored add would pop up on my Instagram feed almost daily, so, when I finally pulled the trigger, I was very excited to get them. When they arrived and I put them on for the first time, I was not disappointed! I agree with the reviews that the back pocket opening may be a bit small, but my phone went in without too much trouble (getting it out was tougher). The material is great, and the liner was definitely worth it. The most notable difference between these shorts and similar pairs from other brands is the shorts are tighter on my legs. This doesn’t bother me, but I thought it was worth noting. For comparison, I’m 6’3”, 205 lbs, and workout 5-7 days a week. Plus, my wife tells me not to skip leg day, so my legs are larger than expected when compared to my waist size. All in all, I hope to get another pair in the future. Thanks for the quality product