The Mach Allegiance MK1 is a tribute to all of those who serve us both previous and current. Stand out at the finish line supporting those who have served.

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

Customer Reviews

Based on 6 reviews
Lori Stottlemire
Something special!

Nicely designed kit with smooth details!
Something special delivered to your door. Can’t wait to open the pretty black box! Well done indeed.

Kirsten Robinson
Super comfortable!

These shorts are awesome, they fit great and have support in all of the right places! I was very impressed, also they are very lightweight and totally worth it!

Comfortable, well performing shorts

These shorts are not only cute but they feel great to wear. I wore these for a 45 mile bike ride and they felt amazing the entire time. The padding is enough to be comfortable but not too much where it feels like a diaper. The seams on the shorts are flattering and won't cut into your legs like other shorts. Made from quality materials and from a great company, can't go wrong with buying these!

Mia Meydrich
comfortable and stylish

i'm very happy with these shorts! they provided me with a good chamois, they're comfy, and i like the look of them a lot

Super soft!

I have the aero suit and I bought this kit on a whim. The pictures don't do the colors justice as it looks less pink and more fuschia. There are no seams where I normally chafe which is a godsend. Less slathering myself in trislide/bodyglide. I wore it on a long run in the blazing sun and it stayed perfectly cool. The chamois has enough padding to be effective but not get in the way. Their customer service is extremely responsive when I reached out with questions (thanks Sean!) Love this kit.