Size Guide


The Mach One MK1 is the OG design. This one is what started it all and is a staple in all of our closets. This design looks as fast as it actually is. Matches perfectly with the Mach One Jersey.

Built using the highest quality fabrics sustainably sourced and sustainably manufactured in the US, we spared no research or expense in producing the best triathlon shorts in the world. Breathable and fast materials make these your go-to shorts for training, racing and winning.

We tested over 13 prototypes in creating the perfect fit which means you are more aero and more comfortable for the duration of your event, no matter how long. 


  • Side entry pockets to keep the wind out and keep you tucked and aero. 
  • UPF 50 sun protection
  • High-performance chamois for all-day comfort
  • Unique leg grippers to ensure a secure fit

Committed to the athlete, we believe that technology, eco-friendly production and minimalist design aesthetics can work in harmony to produce the best triathlon apparel in the world. Mach Apparel was founded on the pursuit of building the best triathlon apparel in the world. #Builttobreakbarriers

UPF 50 Sun protection

High performance chamois for all day comfort

Exclusive gripper provides an in-place fit and finish

"As a former member fo the US National Team, I've had the opportunity to test a wide range of endurance apparel. Mach Apparel stands out to me in regards to it's comfort and breathability which allows the athlete to hold up better and have that extra freshness to surpass previous barriers."
Austin Arguello

Wind Tunnel Tested
Wind Tunnel Tested
Made In the USA
Made In the USA

What is DR711 Anti-Microbial Protection?

Most "anti-microbial" fabrics only have a weak passive barrier against odor causing contaminants. Mach's DR711TM treatment actively absorbs and kills 99.9% of all microbes and bacteria that contacts it within eight hours. Mach's DR711TM treated fabric will stay odor-free, clean, and pleasant to wear through intense training and extreme use.

DR711 Anti-Microbial Core Performance Features

Grow Your Capabilities. Lower Your Impact.

Grow Your Capabilities. Lower Your Impact

Lead your race and your community

Our proprietary MGT140 - Mach Green Tech allows us to turn recycled plastic into the most comfortable, high performance tri-gear.

Sizing Chart

Please see the Men's & Women's sizing charts below to ensure the best fit possible.

Sizing refers to body measurements, not garment dimensions.

Chest: Around the chest, just under the arms and across the shoulder blades.

Waist: Around the narrowest part of the waist.

Hip: Around the widest point of the hips.

Pro Tip: To increase accuracy, please have someone help you if possible.