Best Medium Triathlon Suits of 2026

Luke Dobson Avatar
Luke Dobson
Last Updated: 11 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Medium Triathlon Suits are the perfect solution for triathletes looking for high-quality, comfortable, and functional athletic wear. These suits are designed to provide optimal performance during all three stages of a triathlon, with features such as quick-drying materials, breathable fabrics, and streamlined designs that reduce drag in the water. These suits come in a wide range of colours and styles to suit your preferences, and are available in medium sizes to fit a range of body types. Whether you're a seasoned triathlete or just starting out, Medium Triathlon Suits are an excellent choice for anyone looking to improve their performance and enjoy a comfortable, stylish race.

At a Glance: Our Top Picks

SLS3 Aerodynamic Sleeved Lightweight Triathlon Suit Men Cover #TOP 1
SLS3 Aerodynamic Sleeved Lightweight Triathlon Suit Men
ftb score rating icon 9.8
Santic Women’s Sleeveless Triathlon Suit with Padding Cover #TOP 2
Santic Women’s Sleeveless Triathlon Suit with Padding
ftb score rating icon 9.7
MY KILOMETRE Youth Triathlon Race Suit Cover #TOP 3
MY KILOMETRE Youth Triathlon Race Suit
ftb score rating icon 9.5

Top 3 Medium Triathlon Suits

#TOP 1

SLS3 Aerodynamic Sleeved Lightweight Triathlon Suit Men

FX1A-24-BRD-M
Flash
SLS3 Aerodynamic Sleeved Lightweight Triathlon Suit Men Cover
SLS3 Triathlon Suits Mens - Aerodynamic Sleeved Tri Suit Men – Lightweight Trisuit with Premium FX Fabrics - 2 Pockets (Flash, Medium)

The SLS3 Triathlon Suit is designed with your comfort and performance in mind. Its premium fit is tailored larger than other brands, ensuring you find the perfect size with the provided chart. The breathable and quick-drying fabric keeps you cool and dry, which is essential during intense races. The custom foam padding offers chafe-free support for cycling and running, helping you transition smoothly without discomfort. Additionally, the aero design features two back pockets, giving you easy access to nutrition and gear while reducing drag for better speed.

What We Like
Comfortable, larger fit
Breathable, quick-drying fabric
Chafe-free cycling padding
Aero design with pockets
#TOP 2

Santic Women’s Sleeveless Triathlon Suit with Padding

SDK-K9LG083JUXL
Black-orange
Santic Women’s Sleeveless Triathlon Suit with Padding Cover
Santic Women Triathlon Suit Quick-Drying One-Piece Sleeveless Tri-Suit with Padded, Black-Orange, Medium

The Santic Women’s Tri Suit is designed specifically for female athletes, featuring a body-zone panel cut and stretched leg waistline to provide an optimal fit and create a flattering shape. The back zipper with a long rope makes it easier for you to get dressed quickly and comfortably during transitions. You’ll also appreciate the built-in lift for your buttocks, enhancing your silhouette. Convenient net fabric pockets on the left leg allow you to store keys or energy bars, keeping essentials within easy reach while cycling or running.

What We Like
Female-specific fit
Easy back zipper with rope
Buttocks lift design
Accessible side pockets
#TOP 3

MY KILOMETRE Youth Triathlon Race Suit

Boy-trisuitBlueM
Blue
MY KILOMETRE Youth Triathlon Race Suit Cover
MY KILOMETRE Youth Core Triathlon Race Suit Boy Spring Competition Training Suits, Blue, Medium

The MY KILOMETRE Tri Suit is designed for young athletes participating in triathlons. Made from durable fabrics, it resists wear and tear, ensuring long-lasting use. The 6-mm chamois offers essential comfort and protection, allowing you to focus on your performance. With flatlock stitching, this suit prevents chafing, providing a comfortable fit during training and races. Additionally, the front zipper allows for easy ventilation, while the rear pocket conveniently holds hydration gels, making your race experience smoother and more enjoyable.

What We Like
Durable, long-lasting fabric
Comfortable chamois for support
Chafe-free design
Easy ventilation with zipper
Convenient rear pocket
Buying Guide Image
Editor's Notes

During our medium triathlon suit research, we found 75 medium triathlon suit products and shortlisted 3 quality products. We collected and analyzed 4,788 customer reviews through our big data system to write the medium triathlon suits list. We found that most customers choose medium triathlon suits with an average price of £20.00.

The medium triathlon suits are available for purchase. We have researched hundreds of brands and picked the top brands of medium triathlon suits, including SLS3, Santic, MY KILOMETRE.

Written by
Luke Dobson Avatar

Luke is a runner, a climber, hiker, hunter, and a lot more. Luke Dobson is Celtic-born and has lived most of his life in Scotland. However, his sporting endeavours have taken him to several countries around Europe. He serves as a tour guide for countless companies and owns a couple of gyms and recreational centres in Scotland. Luke Dobson is proficient in 7 different languages. He maintains many sport article columns where he shares his wealth of experience in the sport industry.