Underwear Glossary   Bra Glossary   Fashion Products   Fashion Products U   Fashion Influence  Types of T-shirts

Undershirts: The Hidden Foundation of Comfort

What are Undershirts?

Undershirts are a type of undergarment typically worn beneath clothing, primarily as a layer between the body and outer garments. They are designed to provide various functions, including absorbing sweat, protecting clothing from oils and odors, providing additional warmth, and offering a smoother silhouette.

Difference Between an Undershirt and a T-shirt:


An undershirt is specifically designed as an undergarment. It often has a more tailored fit, is made from lightweight fabric, and is meant to be worn discreetly beneath other clothing.


A T-shirt, on the other hand, is a standalone garment. It's typically made from thicker fabric, may have various necklines and sleeve lengths, and is often designed to be a visible part of an outfit.

Styles of Undershirts:

Crew Neck:


Sleeveless/ Tank Top:


Most Popular Undershirt Color:

White is the most popular undershirt color. It is a classic choice due to its versatility and the fact that it minimally impacts the overall color of clothing worn over it. White undershirts are discreet under light-colored clothing and generally blend well under most outfits.

White undershirts are particularly popular for their ability to seamlessly blend with various styles, whether formal or casual. They also offer a fresh and clean aesthetic. However, undershirts are available in a range of colors to cater to individual preferences and specific outfit requirements.

Apparel Search generally believes that people should wash their undergarments after each wearing.  However, this is not always necessary or practical for some people.  The frequency of washing undershirts largely depends on personal preference, lifestyle, and individual factors such as sweat levels, body odor, and overall hygiene standards. However, here are some general guidelines to consider:

Daily or After Each Use:

Heavy Sweat Days:

Every 1-2 Wears:

Consider Your Environment:

Use of Antiperspirants or Deodorants:

Monitor Odors:

Prevent Stains:

Remember, maintaining good hygiene practices and keeping your undershirts clean is essential not only for personal comfort but also for extending the life and quality of the garments. Always follow care instructions provided by the manufacturer to ensure proper washing and maintenance of your undershirts.

In the fashion industry, the choice of fabric weight for undershirts can vary based on the desired characteristics, seasonality, and the intended purpose of the undershirt. Here are some typical fabric weights used for undershirt manufacturing:

Lightweight Fabrics (3-4 oz/sq yd or 100-135 gsm):

Lightweight fabrics are common for undershirts, especially for warmer climates or summer wear. They offer breathability, comfort, and a barely-there feel, making them ideal for layering.

Mediumweight Fabrics (5-6 oz/sq yd or 170-205 gsm):

Mediumweight fabrics strike a balance between breathability and durability. They are versatile and suitable for year-round wear, providing a bit more substance while remaining comfortable.

Heavyweight Fabrics (7+ oz/sq yd or 235+ gsm):

Heavyweight fabrics are used for cooler seasons or when additional warmth is desired. They provide more insulation and are suitable for undershirts worn during fall or winter.

It's important to note that the above fabric weights are approximate, and actual weights can vary based on the specific blend of materials, fabric construction, and manufacturing techniques. Additionally, some brands and manufacturers may have unique fabric weight preferences based on their target audience and design preferences.

The choice of fabric weight for undershirts often depends on factors such as climate, season, intended use, and personal preference. Designers and manufacturers carefully consider these factors to create undershirts that provide the right balance of comfort, breathability, and insulation.

Learn about underwear.

Learn about t-shirts and other types of tops.