10 Best Tri Shorts 2025 in the United States

The Castelli Men’s Tri Short offers a fitted design that is ideal for triathletes seeking comfort and versatility in a two-piece race kit. Its standout feature is the KISS Tri seat pad, which provides excellent cushioning for cycling without causing discomfort during the run. The secure fit is enhanced by an inside drawcord and SnapLock fastener, helping the shorts stay in place through swimming, biking, and running. This makes it a reliable option for triathlons or intense training sessions.

The shorts also have GIRO3 leg grippers, which prevent the fabric from sliding up, offering stability and comfort during movement. A rear pocket adds practicality for storing nutrition gels or energy bars, though there is only one pocket, which might be limiting for some users. The UPF 50+ rating is a great bonus, protecting your skin from sun exposure during outdoor workouts. The shorts require hand washing, which is normal for high-performance gear but might require more care than casual shorts.

Weighing just 6.4 ounces, they are lightweight and made either in the USA or imported. The design emphasizes comfort and function, making it a solid choice for triathletes who want a dependable tri short with good padding and secure fit features.

The MY KILOMETRE Men's Triathlon Shorts are designed with a blend of 78% Regenerated Polyamide and 22% Xtra Life Lycra fibre, which makes them durable and chlorine resistant, suitable for both pool swims and outdoor use with UPF 50+ protection. The moderate compression helps with muscle support during long-distance races.

These shorts feature the MK TRI2.0 MULTI DENSITY CHAMOIS for enhanced comfort and performance, specifically designed to support the aero position on the bike and comfort during the run. The chamois padding is a significant strength, as it balances cushioning and flexibility well for long-distance triathlons. The shorts also come with accessible storage pockets on each side, providing easy access to nutrition during activities.

The ultra-thin and ultra-light elastic leg grippers ensure a snug fit without discomfort from silicone, making them ideal for extended wear. Additionally, the flat locked stitching minimizes chafing and follows the body's contours, enhancing comfort and durability. However, the requirement to hand wash the shorts might be seen as slightly inconvenient for those looking for low-maintenance gear. Despite this, the MY KILOMETRE Men's Triathlon Shorts offer a combination of comfort, functionality, and durability that makes them a strong choice for triathletes, especially those participating in longer events.

The MY KILOMETRE Men’s Triathlon Shorts are designed with high-performance features suited for long-distance tri races. Made from a durable blend of 80% polyamide and 20% Xtra Life Lycra, these shorts offer muscle compression, improved aerodynamics, and chlorine resistance, making them great for both pool swims and cycling. The UPF 50+ protection is a nice bonus for outdoor use. The chamois padding is multi-density and shaped specifically for the aero bike position, which should provide good comfort during cycling and the run, but might feel a bit firm if you prefer softer padding.

The adjustable drawstring helps secure the fit, while the wide, elastic leg grippers with silicone prints prevent the shorts from riding up, enhancing comfort during movement. Flat locked stitching minimizes chafing, which is essential for long races. One standout feature is the easy-to-access storage pockets on each leg, perfect for carrying nutrition without interrupting your ride or run. These shorts require hand washing, which might be less convenient for some. Also, the pull-on closure is simple but might not offer as tight a fit as zippered options. This product is well-suited for triathletes looking for durable, functional shorts with practical storage and a focus on comfort and performance.