Men's undershirts are one of those basics that seem simple until you need to buy them. Whether you're replacing worn-out ones or stocking up for the first time, understanding what to look for makes the difference between shirts that feel comfortable all day and ones you'll want to replace in a few months. This guide walks you through the key decisions you'll face when shopping for crew neck undershirts.

Understanding Size: Finding Your Fit

Undershirt sizing matters more than many people realize. Men's crew undershirts typically come in standard sizes: Small, Medium, Large, Extra Large, and larger. The Medium size, for instance, is designed to fit an average-build man comfortably without being too tight or too loose.

To find your size, measure your chest at its fullest point while wearing a regular shirt. If you measure around 38 to 40 inches, Medium is likely your size. Remember that undershirts should fit snugly enough to stay tucked but not so tight that they restrict movement or bunch under your outer shirt. Many people make the mistake of sizing up too much, thinking comfort means loose fit, but a properly sized undershirt actually moves better and stays in place throughout the day.

What Stay Tucked Actually Means

If you've noticed your undershirts working their way out from under your pants by midday, you've experienced the classic undershirt frustration. Modern undershirts designed to stay tucked include features that address this problem. Fruit of the Loom's Stay Tucked design, for example, uses a classic fit engineered for your full range of movement while remaining tucked. The shorter cut and tailoring prevent the shirt from riding up when you bend, stretch, or sit.

Stay tucked shirts work best when they fit properly. If your undershirt is too large, no design feature will keep it in place. If it's too small, it will pull out when you move.

Material and Comfort Considerations

Most everyday undershirts are made from cotton or cotton-blend fabrics. Cotton breathes well and feels soft against skin, making it a reliable choice for all-day wear. The Fruit of the Loom Men's Eversoft Cotton Stay Tucked Crew T-shirt, model 6P2828, uses cotton construction with soft covered seams on the neck and shoulders. These covered seams reduce irritation in areas where friction occurs most often—a simple feature that noticeably improves comfort over a full day of wear.

Beyond the fabric itself, moisture-wicking capability matters if you're active or in warm environments. A shirt that wicks moisture moves sweat away from your skin, helping you feel drier and more comfortable. This feature is especially worth seeking out if you'll be wearing your undershirts under formal shirts during long workdays or in warm climates.

Buying in Bulk: The Pack Strategy

Undershirts often come in multi-packs. A 6-pack, like the Fruit of the Loom Men's Stay Tucked Crew T-Shirt in Medium, means you're buying six identical shirts at once. This makes sense for several reasons: you have enough for two weeks without laundry, you minimize decision-making, and multi-packs typically offer better value than buying single shirts. However, only buy a multi-pack if you're confident about your size and style preference.

Care and Durability

How long your undershirts last depends largely on how you wash and wear them. Wash in lukewarm water rather than hot, which can fade white shirts and weaken fabric over time. Avoid fabric softener, which can damage cotton fibers. Dry on medium heat or hang dry to prevent shrinkage. Most quality undershirts, including the Fruit of the Loom Men's Stay Tucked Crew T-Shirt model 6P2828, last for years with proper care. Check your shirts regularly for pilling or thinning fabric—these are signs it's time to retire a shirt.

Plan on replacing your undershirt collection every few years depending on how often you wear them. If you wear one nearly every day, you'll cycle through them faster than someone who wears them occasionally.

Finding the right undershirt is about matching your size, choosing a style that stays in place, and caring for it properly so it remains comfortable. The details matter more than you might expect in something you wear underneath everything else.

The product in this guide: Fruit of the Loom Men's Stay Tucked Crew T-Shirt - Medium - White (Pack of 6)