Under Armour Men's Mk-1 Shorts - Lightweight 7ft Inseam Performance

In this review of the Under Armour Men's Mk-1 Shorts the bottom line is simple: these are a solid, everyday active short for athletes who prioritize breathability and freedom of movement. The reviewer found them ideal for warm ups, practice, and casual wear thanks to their super lightweight knit and 4-way stretch fabric. The emphasis throughout is on comfort and moisture management, so anyone who sweats during activity or wants easy layering after a workout will appreciate these shorts.

Key Features

• Stretchy knit fabric: Feels lightweight and soft against the skin, making long practices and post-game wear more comfortable.
• Moisture-wicking material: Moves sweat away from the body and dries fast so the shorts stay comfortable during intense sessions.
• 4-way stretch: Allows free movement in all directions, which is useful for dynamic drills and agility work.
• Mesh side panels: Add targeted ventilation to help prevent overheating during high-intensity efforts.
• Encased waistband with drawcord: Provides an adjustable fit that stays secure without digging in.
• Open hand pockets: Offer simple storage for small items when not training, with an uncomplicated, low-profile design.

Who It's For

The Mk-1 Shorts are best for active men who need a lightweight short for training, warm ups, or everyday athletic wear; runners, gym-goers, and team-sport players will find the 7' inseam and 4-way stretch especially useful. The shorts work well for layered outfits and for days when quick drying and breathability are priorities.

These are not intended for swimmers or users who require a built-in liner or compression shorts, so those who want built-in support should look elsewhere. Also, users who need zip pockets or more structured cargo storage may prefer a different style.

Pros & Cons

Pros

• Very lightweight knit feels comfortable for extended wear and travel.
• Fabric wicks sweat effectively and dries quickly after intense workouts.
• 4-way stretch and mesh side panels combine for excellent mobility and breathability.
• Adjustable encased waistband keeps fit secure without bulk.

Cons

• No liner included, so users seeking built-in support will need a separate layer.
• Pockets are open hand style only, so small items may not be fully secure during vigorous movement.

Specifications

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

Our Verdict

The Under Armour Men's Mk-1 Shorts are a dependable, no-frills athletic short that delivers on comfort, breathability, and range of motion. For men who want a lightweight training short that dries quickly and moves with them, these offer good value; skip them only if you need a liner or secure zip pockets.

Frequently Asked Questions

Do these shorts have a built-in liner?
No, the Mk-1 Shorts do not include a liner; they are designed as an outer short meant to be paired with separate compression or liners if desired.

How long is the inseam?
The inseam is 7' in, which sits at a mid-thigh length for most men and balances coverage with mobility.

Are the pockets secure for running?
The shorts have open hand pockets that are convenient for light storage, but they are not zippered, so small items may shift during vigorous running.