Under Armour Men's Mk-1 Shorts - Lightweight Stretch and Breathability

In this review of the Under Armour Men's Mk-1 Shorts the bottom line is simple: these are best for active men who want a lightweight, highly breathable short that moves with them. The reviewer found the stretchy knit fabric and 4-way stretch construction deliver an unusually comfortable range of motion, while mesh side panels and moisture-wicking material keep things cool during workouts. For anyone who trains, warms up, or needs a comfortable post-game short, the Mk-1 blends performance fabric and practical features into an easy everyday pick.

Key Features

• Stretchy knit fabric: Feels lightweight against the skin and lets the short move naturally during dynamic movements.
• Moisture-wicking material: Pulls sweat away from the body so the short dries quickly after intense sessions.
• 4-way stretch construction: Allows full mobility in every direction, making lunges, sprints, and cuts feel less restricted.
• Mesh side panels: Add targeted ventilation to help regulate temperature in hot conditions or long sessions.
• Encased waistband with drawcord: Keeps the fit secure without adding bulk or discomfort at the waist.
• Open hand pockets: Provide quick storage for small items without altering the short's athletic profile.

Who It's For

The Mk-1 Shorts suit men who prioritize mobility and breathability: gym goers, runners who prefer a longer 7in inseam, and athletes who need a lightweight short for warm ups or cool downs. The lack of an inner liner makes them especially attractive to those who want a simple, minimal short for layered workouts or casual wear.

Those who want built-in compression or a dedicated performance liner should look elsewhere, as these shorts have no liner. If heavy-duty pockets or cargo storage are required for work or travel, a different style with reinforced pockets would be a better match.

Pros & Cons

Pros

• Very breathable thanks to mesh side panels and a lightweight knit fabric.
• Excellent freedom of movement from the 4-way stretch construction.
• Fast-drying, moisture-wicking material suited to sweaty workouts.
• Simple, comfortable fit with an encased waistband and drawcord.

Cons

• No inner liner, which may be a drawback for runners who prefer built-in support.
• Pockets are open hand style only, so small items are not secured for high-impact use.

Specifications

Brand	Under Armour
Fabric	90% Polyester / 10% Elastane
Inseam	7in
Pockets	Open hand pockets
Liner	No liner
Waist	Encased elastic with internal drawcord
Ventilation	Mesh side panels

Our Verdict

The Under Armour Mk-1 Shorts are a strong value for active men who need a lightweight, breathable short that moves with them. They excel in comfort and quick-dry performance, making them ideal for gym sessions, warm ups, and casual athletic wear; skip them only if you require a built-in liner or secure cargo pockets.

Frequently Asked Questions

Do these shorts have a liner?
They do not include an inner liner; they are a shell-style short with no built-in compression.

What is the inseam length?
The stated inseam for the Mk-1 is 7in, offering moderate coverage suitable for training and warm ups.

Are there pockets for storage?
Yes, there are open hand pockets, but they are not zippered or secured for heavy impact activities.