FREE shipping and returns, always // FREE international shipping over $500 



Pedal Through, by first-time film director and new mountain biker Analise. Follow her journey of self-healing and growth during a week-long bikepacking adventure through the Oregon backcountry.


THE KEY SHORT, 5.5" - Final Sale


Meet the Key Short, the cornerstone of the Versatile Off Road Collection and an overshort designed to adapt to all of your outdoor adventures. From mountain biking, to gravel touring, to urban commuting, to hiking, the Key Short brings Machines' superior fit, construction, and modern styling to this technical outdoor short.

Available in sizes 24-40.



Why We Made This

What would it look like if we brought the Machines aesthetic to the mountain bike and outdoor space? Could we create a short that is equally suitable for bombing single-track as it is for casual day hike with friends? The result of that exploration became the Key Short. A short rich in technical features to have you blazing trails comfortably, with styling that takes you from your bike to the coffee shop without skipping a beat.


- 100% Polyester

- 4-Way Mechanical Stretch

- UPF 50+ by construction

- Water resistant

- Moisture wicking

- Quick dry

- Slide locking snap closure at waist

- Front scoop pockets

- Rear secure zip back pockets w/ puller for easy access

- MFF signature rear phone pocket hidden in waistband

- Offered in 5.5" and 11" inseams

- Contoured hem to reduce excess fabric at knee while riding

Size & Fit

The Key Shorts are cut true to size and have a slim fit.  

Choose the size closest to your waist or jean size. 

5.5" inseam 


Athena is wearing a size 27 and is:

5'10" / bust 34" / waist 28" / hips 39"

Essence is wearing size 28 and is: 

5'7" / bust 36.5" / waist 28.75" / hips 41"

Demi is wearing size 26 and is: 

5'8" / bust 33" / waist 25.75 / hips 37" 

Bianca is wearing size 36 and is: 

5'10" / bust 45" / waist 40.5" / hips 50.5"  

Demi is wearing size 25 and is:

5’8” / bust 32.5” / waist 25” / hip 36”

Lexa is wearing size 38 and is:

5'9" / bust 48.25" / waist 42.5" / hip 47" 


Check out our Fit Guide for more detailed instructions, or pop your measurements into our fit calculator for a personalized recommendation!


Shipping & Returns

All orders are shipped free within the US, and will include a pre-paid return label for easy returns and exchanges.

If ordering from outside of the US, be sure to check local duties and taxes! Machines does not cover this cost and rates vary country to country.

For international returns, please use the carrier of your choice and return to 1475 S 5070 W, Salt Lake City, UT 84104



As always, we put fit first and this product was thoughtfully developed to perform for every shape. Offered in sizes 24 through 38. 


This slide-locking snap closure will keep you buttoned up, even when you're letting loose.


Our 4-way mechanical stretch gives you maximum flexibility. This short will truly keep up with you where ever you are headed!


Pop colors and tastefully designed reflective details give you added style, and safety, on the road.


Sizing Calculator


For cycling bibs and shorts, the HIP MEASUREMENT is the most crucial factor. Measure around the WIDEST POINT of the hips/bum. If you are between sizes or petite (5'3" or under), we recommend SIZING DOWN for a compressive fit. A snug fit is crucial to performance. Check out our FIT GUIDE for more detailed instructions, or pop your measurements into the fit calculator above for a personalized recommendation! (Please note, the fit guide requires chest, waist and hip measurements.)