T-shirts aren’t rocket science, but there is a wide array of options available on the market, and anyone who has spent a minute looking at a screen printer’s catalog knows how overwhelming it can be. Fortunately, knowing a few key attributes can help determine whether your next one finds its way into the Goodwill bin or the bottom of the laundry basket. This post will focus on fabric weight and fiber (the material that makes up the threads). Odds are, you already have a favorite weight and fiber determining which shirts you reach for in the morning, even if you don’t know it!
Fabric weight is measured in ounces per square yard (in the US, anyway). In the old days, when the Baby Boomers were putting on their protest t-shirts, there was a close connection between weight and quality - heavy shirts were good, light shirts were cheap.
Heavier shirts (in the 5.5oz - 6.1oz range) are more durable and warmer - if that’s what you’re going for in a t-shirt. Some people would just as soon have a shirt that keeps them cool, and not everyone cares that their shirts be as resistant to snags or tears. If you’re in the latter camp, then you likely want a shirt in the 3oz - 5.4oz range. For example, I wear 6.1oz shirts beneath my sweaters in the winter, and 3.7oz blended tees throughout the summer - the same way you might alternate between boots and boat shoes.
Cotton is a natural fiber, grown all over the world. It is warm when dry. It can absorb and dissipate a moderate amount of moisture before becoming uncomfortable, but once really wet, it’s a problem. It comes in a few varieties (Pima and Egyptian cotton are noted for having soft, smooth hands), but the most important aspect of cotton is how it is processed. A normal cotton fiber is kind of gnarled and toothy under a microscope. If you turn it into yarn right from that, you wind up with a cheap but scratchier cotton. That’s what most of your freebie shirts / gym class t-shirts / or any other shirt that someone gave you at an event probably was. They aren’t unwearable or horribly uncomfortable by any means, but they do tend to be a little stiffer and scratchy after a few washings. These cheap shirts are made by all of the major t-shirt manufacturers - Gildan, Fruit of the Loom, Hanes, Anvil, etc. Most also make nicer cotton, but since the majority of custom t-shirt orders try to maximize budget for number of shirts, these are still the most common styles out there.
The bigger determinant of quality when it comes to a shirt of any weight is the fabric. Most shirts are made of either 100% cotton, 100% polyester, or a blend of the two (sometimes with rayon, viscose, spandex, or another third material worked in). Let’s explore these in reverse order:
Polyester fibers are actually a plastic, spun into thread. For this reason, they do not absorb water, and are great for sports. Any performance fabric / moisture wicking / drifit / whatever marketing slogan they use next fabric is most likely going to be polyester (maybe with some spandex added). The pros are that these garments really do keep you cool. They’re light, flowy, and they won’t collect sweat. The cons are that they generally tend to smell sooner than cotton (a washing will fix it), snag / tear easier than cotton, and tend to look a little out of place when not doing anything athletic.
Spandex is often added in small amounts (usually less than 5% of the fabric make-up) to impart a slight stretch to the fabric. This is typically in sports fabrics, and more common in women’s apparel. If you’ve ever noticed how some Nike or Under Armour shirts cling tightly to the body while others hang loose - even though both are performance / moisture wicking fabrics - it’s because the tight fitting ones have Spandex.
Rayon or viscose are commonly used in blends alongside cotton and polyester to give the shirt a soft, vintage feel. These fabrics are commonly called triblends, because they are cotton + polyester + the third material. These are almost always very lightweight fabrics, and most brands construct them in a more athletic cut shirt.
By contrast, nicer shirts tend to have ringspun, combed cotton. This means that before they turn the cotton into a yarn, it is combed and spun in a process that leaves the fibers smoother and softer. That’s why the more expensive shirts that you get at (most) retail have a noticeable softer hand. They can do this for heavy cotton shirts (like the 6.1oz Hanes Beefy T), or for lightweight ones (like American Apparel’s classic 2001 style.)
Blended shirts combine properties of various fabrics. A 50/50 (cotton/poly) blend is probably the most common. It’s neither as warm as 100% cotton or as moisture wicking as 100% polyester, but it will process more sweat without becoming an issue on a warm day, and keep you warmer than poly would on a chilly one, while resisting snags a little better and not stinking as quickly. Cotton and polyester are also combined for style reasons. Heather shirts achieve their mottled, contrasting internal colors by using cotton and polyester fibers together. As discussed above, rayon, viscose, or other third materials can also be added to blends to achieve different effects.
There are no hard rights and wrongs - just what you prefer. We’ve found, for example, that older men tend to prefer heavy cotton shirts while women gravitate toward lighter weights, while younger customers gravitate toward lightweight blends. Most of the shirts you’d see in Urban Outfitters, for example, are going to be lighter weight triblends or 50/50s.
It also depends on what you’re wearing it for. If you’re going to be wearing your shirt while working as a carpenter, you probably want a heavier weight cotton that will resist tears better. Cops and athletes tend to prefer moisture wicking, while our military clients are usually prohibited from wearing it (even though it would be ideal from a performance standpoint), because of the risk of the plastic fibers melting to the skin in the event of an explosion. Want a shirt for running after work, but don’t like the feel of performance tees? Get yourself a nice 25% cotton triblend!
For most of us, though, it’s just about the feel. Ask yourself how heavy you like your shirts based on the first header above, and then determine what fabric probably suits you based on the second. There are a million options, and probably one just for you.
Sales plug! We eat and sleep this stuff. We know you can get a screen printed shirt anywhere, and are determined to earn your business by providing the insight you need to get just what you’re looking for. Get in touch with one of our salespeople (fill out a form, email us, use the chat window, or call!) and we’ll be happy to help you navigate the process!
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T-shirts are a wardrobe essential that everyone owns but despite their status as a ‘basic’ they’re not as simple a garment as that name sounds. There are a quite a few details that can influence how comfortable a T-shirt is to wear. One of the most important of these is a T-shirt’s weight.
Most people still don’t think of T-shirts in terms of weight though. That’s because most T-shirt brands don’t really promote the dimension. A T-shirt is just a T-shirt and it’s as simple as that. No need to say any more. But we think that’s a mistake because the weight of the tee puts the T-shirt into perspective. Understand the weight and you get a better idea of when the tee should be worn. Put plainly, the weight is something you need to look out for if you want to feel comfortable in your tee across the seasons. And in this post we’re going to give you a bit more detail on what’s involved…
Here’s a quick summary of lightweight vs. heavyweight T-shirts but skip to the full article to get more detail:
Let’s get an important acronym out of the way first: GSM. It stands for ‘grams per square metre’ and is a measure of how much a square metre of a fabric weighs. It’s used in clothing to describe fabric weight.
A T-shirt with a higher GSM will be thicker and weightier. And the lower the GSM, the lighter the T-shirt would be. Simple.
Finding the GSM isn’t always so easy though as not all brands will add an indication of GSM. A quality T-shirt brand should have this detail included on the label, though, and if you see it it’s a good sign that thought has been put into the garment. We’ve added an indication of the GSMs you should be looking for under each type of tee that we’re going to look at, next.
The Lightweight T-Shirt
What you don’t want in summer is a thick T-shirt that looks the part but suffocates the upper body. The low-GSM fabric of this kind of tee will keep you cool in the more intense heat and stops you from getting too sweaty.
Beyond the GSM you should also look for a T-shirt made from a fabric that’s light and breathable. Cotton is a great choice but there are some even more ideal (and sustainable) alternatives like Lyocell. Lyocell is a fabric derived from wood that is extremely light and breathable, and also less transparent than cotton in lighter weaves. It’s perfect for summer tees.
SANVT’s lightweight summer T-shirt is made from an optimal mix of premium cotton and Lyocell.
The Heavyweight T-Shirt
While the summer is the traditional season of the tee, that’s not to say that T-shirts can’t be worn across the seasons. But if you’re going to try and sport a tee in colder conditions then you’ll need one that’s designed for the purpose.
Heavyweight tees are just that and made from thicker fabric of a higher GSM. They keep you a bit snugger when the temperatures dip and are also more durable overall.
A factor to bear in mind with heavyweight tees is that while you want to feel snug you don’t want to compromise on breathability. Choose a T-shirt like our Heavyweight T-Shirt that’s made from a breathable, natural fabric and avoid uncomfortable synthetic blends that can irritate the skin and make you sweat more.
The perfect T-Shirt in three basic colours
All-season T-shirts are versatile. They might lack the advantages of lightweight and heavyweight T-shirts in more extreme conditions but they work well in most conditions. It’s a useful type of tee to own and with a shirt like our Perfect T-Shirt you can't go wrong.
Like with the more specialist tees, the GSM is important and you should be aiming for a Tee within a range of around 160 and 200. Cotton is the classic fabric for this type of tee but opt for a high-quality and sustainable type of cotton, like GOTS-certified organic cotton. As a rule, avoid cheap cotton at all costs – whatever kind of T-shirt you’re buying.
Despite the versatility of this type of tee, if you are going to wear a tee in particularly cold or hot conditions then we’d recommend also having a specialist T-shirt to call on too.
Looking for your perfect T-shirt? Take the weight into account, that’s what we say. Check for the GSM and buy something that suits the season. It’s the way to look great and feel comfortable.
We also recommend choosing a T-shirt that’s high-quality and sustainable. That way, you’ll have the T-shirt for many seasons – whatever the conditions.
The following infographic will help you to keep this information in mind. You can download it here and share it with your friends.
You found the perfect T-Shirt for you? Find out more on how to care for a cotton T-Shirt so it lasts longer!