Under Armour ColdGear Armour Fitted Mock Top, Men’s, Model 1366066

Model: Under Armour ColdGear Armour Fitted Mock is a long-sleeved men’s base layer described for cold-weather training and winter sports. Its fitted cut, brushed interior and smooth quick-drying exterior are intended to add warmth without bulky layering, though customer feedback indicates sizing can run large.

At a glance

Long-sleeved mock-neck thermal base layer for cold-weather activity.
Listing describes a brushed interior and smooth, fast-drying exterior.
4-way stretch is described as allowing movement in all directions.
Fitted cut is intended to reduce excess fabric beneath other clothing.

Price

£33.29Save 33%

Reference price: ~~£50.00~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Stretch fabric and fitted styling are suited to wearing as a close-fitting layer under sportswear.
Customer feedback reports warmth, comfortable texture and use under bike gear.
Care guidance specifies cold machine washing with like colours.

Technical specifications

8 specifications

Identity
Brand	Under Armour
Model	1366066
Department	Men's

Fit and materials
Fit	Fitted
Fabric composition	87% Polyester and 13% Elastane

Care
Washing	Machine wash cold with like colors
Bleaching	Use only non-chlorine bleach when needed
Preparation	Wash garment inside out

What to know before buying

Listing details to confirm

The listing uses both “ColdGear” and “HeatGear” names in its content, and the title describes a warm cold-weather layer while manufacturer copy elsewhere describes HeatGear as a cooler-wearing baselayer. Confirm the selected item and intended warmth before buying. Customer feedback also includes reports that sizing runs large, so consult the size guide.

Who is it for?

A good fit for

Men seeking a close-fitting long-sleeved layer for cold-weather workouts or winter sports.
Buyers who want a stretchy base layer to wear beneath cycling or other sports gear.

Less suited to

Anyone seeking a loose-fitting top or a confirmed size without checking the size guide.
Buyers who need a clearly specified insulation rating or independently verified temperature range.

Under Armour ColdGear Armour Fitted Mock Top, Men’s, Model 1366066 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 5,677 ratings

5 stars75%75%
4 stars17%17%
3 stars6%6%
2 stars0%0%
1 star2%2%

Customer feedback highlights warmth, a pleasant soft texture and a fit that some find comfortable beneath bike gear. Several customers also say the shirt runs too big, making sizing a practical consideration for anyone wanting a close-fitting base layer. These are reported experiences rather than a guarantee of fit or performance for every wearer.

Positive themes

Customers report warmth in cold weather and comfort beneath bike gear.
Feedback describes the texture as soft and pleasant.

Negative themes

Some customers report that the shirt runs too big.

Mixed feedback

Fit is described positively by some customers, while others say sizing runs large.

Frequently asked questions

Is this top designed for cold weather?

The title and product description position it as a cold-weather thermal layer. However, other listing copy refers to HeatGear and cooler-wearing performance, so check that the selected item is the intended ColdGear version.

What is the fit like?

It is described as fitted, with a streamlined cut. Customer feedback says some people find it runs large, so use the size guide before choosing.

What is the fabric made from?

The product description states 87% polyester and 13% elastane.

How should it be washed?

The listing advises washing the garment inside out in cold water with like colours, and using only non-chlorine bleach when needed.