US M | US W | EURO | UK | AUS | JAPAN | CHINA |
4 | 5.5 | 35.5 | 3 | 4 | 21.5 | 36 |
4.5 | 6 | 36 | 3.5 | 4.5 | 22 | 37 |
5 | 6.5 | 37 | 4 | 5 | 22.5 | 38 |
5.5 | 7 | 37.5 | 5 | 5.5 | 23 | 39 |
6 | 7.5 | 38 | 5.5 | 6 | 23.5 | 39.5 |
6.5 | 8 | 38.5 | 6 | 6.5 | 24 | 40 |
7 | 8.5 | 39 | 6.5 | 7 | 24.5 | 41 |
7.5 | 9 | 40 | 7 | 7.5 | 25 | 41.5 |
8 | 9.5 | 41 | 7.5 | 8 | 25.5 | 42 |
8.5 | 10 | 42 | 8 | 8.5 | 26 | 43 |
9 | 10.5 | 43 | 8.5 | 9 | 27 | 43.5 |
9.5 | 11 | 43.25 | 8.75 | 9.5 | 27.25 | 44 |
10 | 11.5 | 43.5 | 9 | 10 | 27.5 | 44.5 |
10.5 | 12 | 44 | 10 | 10.5 | 28 | 45 |
11 | 44.5 | 10.5 | 11 | 28.5 | 46 | |
11.5 | 45 | 11 | 11.5 | 29 | 46.5 | |
12 | 46 | 11.5 | 12 | 29.5 | 47 | |
12.5 | 46.5 | 12 | 12 | 30.5 | 48 |
PRODUCT DETAILS

Product Description:
Our best-selling 5” Middle Short is now even better with an outer shell made from our lightest, fastest-drying fabric—AFO stretch woven. Newly updated, an interior brief liner pocket with key-loop bungee and intuitive back pocket redesign further solidifies this as a daily running essential.
Built as an all-around performer and everyday running essential, the Middle Short is a silhouette we've been refining since the very beginning. It's our go-to short for crushing the majority of our mileage and is consistently ranked as a best-in-class running short.
Features and Benefits:
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Ultra-lightweight, 4-way stretch AirFlatOut woven fabric for a barely-there-feeling shell
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Fast dry time, high breathability + excellent moisture-wicking for a cool comfortable ride
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Integrated moisture-wicking brief liner
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Perforated knit waistband with internal drawcord provides a secure fit that is both breathable + comfortable
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Bonded hem seams ensure an anti-chafe fit + clean finish
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Secure back zip pocket with nylon zipper pull for easier access in motion can fit most sized phones
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Internal drop down brief pocket for key/card includes a key loop bungee* that doubles as hang loop
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Signature reflective logo on the front and “watermark” reflectivity on the back increases visibility in low light
- Materials: AirFlatOut (AFO) Woven: 88% recycled polyester, 12% elastane; Performance Brief Liner: 94% polyester, 6% spandex
- SKU: MS01A
CUSTOMER RATINGS & REVIEWS
- Reviews
- Questions
- running
- light
- pair

On Men's 5" Lightweight Shorts
Primary use running. This is my 4th pair. Light and dries quickly. Highly recommended.