Under Armour Men's Mk-1 Shorts - Lightweight Performance Shorts

Our review of the Under Armour Men's Mk-1 Shorts finds them best suited for athletes and active men who want a lightweight, easy-moving short for practice, warm ups, or everyday training. The single biggest reason to buy is the combination of super lightweight stretchy knit fabric and 4-way stretch construction, which delivers unrestricted movement and rapid moisture transfer. The review highlights how the shorts balance breathability and simple functionality without a liner, making them a practical pick for anyone who prefers a light, fast-drying layer that does not hold heat.

Key Features

• Lightweight knit fabric: The fabric keeps these shorts feeling barely there during long training sessions, reducing drag and adding comfort.
• Moisture wicking: Material wicks sweat and dries fast so workouts end with less cling and quicker recovery between sets.
• 4-way stretch: The expandable knit moves in every direction for dynamic drills, sprints, and lateral work without restriction.
• Mesh side panels: Strategic mesh increases airflow where heat builds, improving ventilation during intense activity.
• Encased waistband with drawcord: The elastic waistband and internal drawcord keep the fit secure without pinching or shifting.
• Practical pockets: Open hand pockets allow quick carry of small items while keeping the short streamlined since there is no liner.

Who It's For

The Mk-1 Shorts are ideal for men who prioritize mobility and a very light feel in training gear: runners who want minimal weight, gym-goers focused on functional movement, and athletes who need a breathable warm-up short. The fast-drying fabric and mesh panels suit humid conditions and repeated use without a lot of drying time.

Those who want built-in compression or a supportive liner should look elsewhere, as these shorts have no liner and offer a relaxed fit rather than tight support. Also, people needing cargo storage or heavy-duty fabrics for outdoor work may prefer a different style.

Pros & Cons

Pros

• Very lightweight, making them comfortable for long wear and intense training.
• Effective moisture management keeps skin drier through sweat-heavy sessions.
• 4-way stretch and mesh panels combine for unrestricted movement and good breathability.
• Secure fit from encased waistband and internal drawcord without added bulk.

Cons

• No liner means less built-in support for those who prefer compression or inner pockets.
• Open hand pockets are simple and not suitable for carrying larger items securely.

Specifications

Our Verdict

The Under Armour Mk-1 Shorts are a smart choice for anyone who wants a lightweight, breathable training short that moves with the body and dries quickly. They are good value for athletes who prioritize comfort and mobility over built-in compression or heavy storage, making them a dependable everyday performance short.

Frequently Asked Questions

Do these shorts have a liner?
No, the Mk-1 Shorts do not include a liner; they are designed as a lightweight shell.

What is the inseam length?
The inseam measures 7 in, providing moderate coverage suitable for most training needs.

Are the pockets secure for keys?
The open hand pockets are convenient for small items but are not zippered, so they are best for short-term carry during activity.