Under Armour Men's Mk-1 Shorts - Lightweight, Quick-Dry Performance

Our review of the Under Armour Men's Mk-1 Shorts finds them best suited to anyone who wants a simple, performance-oriented training short that prioritizes mobility and breathability. The single biggest reason to buy is the combination of ultra-light stretchy knit fabric and 4-way stretch construction that lets the shorts move naturally during sprints, lifts, and drills without feeling restrictive. They are a practical choice for athletes and everyday active men who value quick-drying material and a clean, no-frills design.

Key Features

• Lightweight knit fabric: The material feels barely there on the skin, reducing drag and making the shorts comfortable for long sessions.
• Fast wicking: The fabric pulls sweat away from the body and dries quickly so the wearer stays cooler during intense exercise.
• 4-way stretch: The stretch construction enables unrestricted movement in every direction for dynamic training and warm ups.
• Mesh side panels: Built-in mesh zones improve airflow along the hips and thighs to aid ventilation on hot days.
• Encased waistband with drawcord: The elastic waistband and internal drawcord provide a secure, adjustable fit without bulk.
• Open hand pockets: Simple pockets offer quick storage for keys or a phone during casual wear.

Who It's For

The Mk-1 Shorts are ideal for gym goers, runners doing warm-ups, and teams looking for lightweight practice shorts; anyone who wants mobility first and a minimal design second will appreciate them. The lack of an inner liner keeps the shorts light and makes them comfortable layered over compression shorts if extra support is needed.

Shoppers who need substantial storage, tailored style for non-athletic wear, or a built-in compression liner should look elsewhere. These are not made for formal occasions or athletes who prefer structured shorts with multiple secure zip pockets.

Pros & Cons

Pros

• Very lightweight knit fabric that stays comfortable for extended wear.
• Material wicks sweat and dries fast, helping to keep the body cooler during workouts.
• Four-way stretch and mesh side panels enhance mobility and ventilation.
• Simple, functional design with encased waistband and pockets for convenience.

Cons

• No liner included, so those who want built-in support will need separate compression shorts.
• Pockets are open hand pockets only, which offer less secure storage during vigorous activity.

Specifications

Brand	Under Armour
Material	90% Polyester / 10% Elastane
Inseam	7 in
Pockets	Open hand pockets
Liner	No liner
Waist	Encased elastic waistband with internal drawcord

Our Verdict

The Under Armour Mk-1 Shorts are a solid, no-nonsense performance short that delivers lightweight comfort, fast wicking, and outstanding mobility for training and warm ups. They represent good value for active men who prioritize breathability and movement; buy them if you want simple, effective workout shorts and are comfortable adding a separate liner when extra support is needed.

Frequently Asked Questions

Do these shorts have a liner?
No, the Mk-1 Shorts do not include a liner; wear them with compression shorts if you want additional support.

How long is the inseam?
The shorts have a 7 in inseam, a typical length for training and general active use.

Are the pockets secure for phone use?
The shorts have open hand pockets, which are convenient but not as secure as zip pockets for vigorous activity.