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Jiu Jitsu Gis<\/a> Hey everyone, if you\u2019ve ever stepped onto a judo mat for the first time (or even if you\u2019ve been at it for a minute and just noticed random people rocking weird layers under their gi), you\u2019ve probably asked this one question: can you wear a regular T-shirt under your judo gi jacket? I get it\u2014when I was first starting out, I grabbed my old cotton gym tee and threw it on under my gi because I thought \u201cmore layers = more sweat = easier to grip my opponent.\u201d Spoiler: I was dead wrong, and that mistake had me red-faced mid-randori with a guy 20 lbs lighter than me. So today, as someone who\u2019s been in the judo gi game for years (and runs a company that makes these bad boys), let\u2019s break this down properly, no jargon, no overcomplicating stuff. First, let\u2019s get one thing straight: judo gis aren\u2019t just fancy tracksuit jackets. They\u2019re made for a very specific sport. Most high-quality gis (like the ones we make) use heavy, durable cotton\u2014often canvas or twill\u2014engineered to withstand being grabbed, twisted, and slammed without ripping. The gi\u2019s entire design is centered on that fabric, its weight, and how it interacts with other gis on the mat. So what happens when you add a regular T-shirt under that jacket? Let\u2019s start with the big one: grip. Judo is all about grips\u2014lapel grips, sleeve grips, all that stuff. When you put a regular cotton tee under your gi, that fabric shifts. Not a little, a lot. The gi\u2019s smooth, dense canvas doesn\u2019t glide easily over another dense gi, but it will slide right over a thin cotton tee. I\u2019ve seen it happen so many times: someone pulls a deep collar grip, and instead of digging into their opponent\u2019s gi, their hand just glides through that tee like it\u2019s butter. That\u2019s not just a tiny inconvenience\u2014that\u2019s a competitive disadvantage. Randori (free practice) becomes a mess of missed grips, and in a tournament, that\u2019s the difference between advancing and heading home early. But wait, what about sweat? A lot of new players say \u201cI need that extra layer to catch sweat so I don\u2019t slip on my own gi or my opponent\u2019s.\u201d Nope, that\u2019s another myth. Regular cotton tees absorb sweat like a sponge, right? So that tee gets soaked through instantly, then it stays damp for the whole practice. Now, that damp tee is heavy, it stretches out, and it makes your gi jacket bunch up around your torso. Suddenly, your sleeve isn\u2019t the length it\u2019s supposed to be, your lapel is shifted to one side, and you\u2019re wasting energy adjusting instead of throwing throws. We\u2019ve tested this with our own gi line too\u2014if you\u2019re sweating, your gi will wick that moisture away way better than a regular cotton tee, as long as you get a gi that\u2019s made for that purpose. Our gis use a special combed cotton that breathes, so you don\u2019t get that sticky, swampy feeling that a tee would leave you with. Here\u2019s another angle: hygiene and damage to your gi. Wait, how does a T-shirt under a gi damage it? Let\u2019s think about fabric friction. A regular cotton tee has rough edges when it\u2019s worn\u2014especially after a few washes, when those little lint balls start popping up. Over time, those lint balls rub against your gi\u2019s inner fabric, causing tiny, frayed fibers. Frayed gi fabric doesn\u2019t just look bad\u2014it weakens the gi\u2019s structure, making it more likely to tear mid-throw. Also, if that tee is anything other than white (wait, some dojos require white gis, right? But even if they allow colored), the dye from a cheap tee can transfer onto your gi\u2019s inner lining. I\u2019ve had a customer send back a gi that looked like it had pink splotches all over the collar because he wore a faded red tee under it\u2014said he didn\u2019t think it would matter. Turned out, the bleach in his tee\u2019s wash mixed with sweat and created a stain that wouldn\u2019t come out. Not fun, especially when you just spent good money on a gi. But wait\u2014before you throw all your tees in the trash and never layer anything, let\u2019s talk about exceptions. Because rules in judo aren\u2019t always black and white (pun totally intended). For example, if you\u2019re a total beginner, and your dojo allows it (some are super strict, some are chill), there\u2019s one type of T-shirt that\u2019s actually okay: a tight-fitting, moisture-wicking technical tee. Not the old cotton one you wear to walk the dog. The kind used for running or crossfit\u2014they\u2019re synthetic, they don\u2019t absorb a ton of sweat, they don\u2019t bunch up, and they don\u2019t leave lint. But even then, it\u2019s only for super casual practice, not tournaments. Most dojos ban any kind of layer under the gi jacket during ranked practice or competitions anyway, so don\u2019t get used to it. Another exception: if you\u2019re training in a super cold dojo. I\u2019ve heard stories from people in places where the mat is freezing in winter\u2014they need a little extra layer to stay warm. But even then, instead of a T-shirt, they use a thin, stretchy spandex or lyre top. It\u2019s tight, it doesn\u2019t bunch, and it doesn\u2019t affect their grips. I actually had a customer last month who\u2019s a judo coach in a gym with terrible heating\u2014he ordered a bunch of our lightweight gis and the spandex layers we sell specifically for that exact reason. He said it\u2019s saved his team from complaining about being cold while still following dojo rules. So now, let\u2019s get into why so many people still wear tees under their gis\u2014mostly misinformation. I can\u2019t tell you how many times I\u2019ve scrolled through judo forums and seen people arguing that \u201ceveryone does it, so it must be fine.\u201d But just because everyone does something doesn\u2019t mean it\u2019s the right thing. When we started our gi company, we interviewed 50 pro judo athletes about layering, and 90% of them said they\u2019d never wear any extra layer under their gi. The ones that did only used those tight technical tees, and only for warm-ups, not randori. These are people who win national and international competitions\u2014they know what works, and what doesn\u2019t. Let\u2019s also talk about fit. A gi is supposed to fit just right: the sleeve should end at the mid-forearm, the pant leg should hit at the ankle, the lapel should cover your collarbone. If you\u2019re wearing a baggy tee under the gi, that adds bulk. Suddenly, the gi feels too tight even if you got the right size, and that bulk makes it harder to move. Judo is all about fluid, precise movements\u2014you can\u2019t afford extra fabric getting in the way of your hip throw or your armbar setup. I\u2019ve had a new customer come to us a few months ago, super frustrated, saying his gi was too tight and he couldn\u2019t bend over properly. When we asked him if he wore a tee under it, he admitted he did\u2014size XL cotton tee. He took it out, and suddenly the gi fit perfectly, like it was meant to. That\u2019s the thing: layering changes everything, even if you don\u2019t think it does. Now, let\u2019s address a common pushback: \u201cBut what if I\u2019m self-conscious about my chest hair or body odor?\u201d Yeah, that\u2019s a real thing, no shame here. A lot of beginners don\u2019t want to be the only one with hair showing under their gi, or they\u2019re worried about smelling. But here\u2019s the solution: good hygiene and a well-fitted gi. Our gis are made to not be see-through, even when you\u2019re sweating through them (we tested that, trust me). And if body odor is a concern, wash your gi after every use, use a detergent that works on heavy fabric, and air-dry it instead of using the dryer. That\u2019s way more effective than wearing a tee under it. Another thing I\u2019ve noticed: a lot of people who wear tees under their gis don\u2019t realize they\u2019re actually damaging their gi longer-term. I mentioned the fraying earlier, but there\u2019s also the issue of stretching. Cotton tees stretch out after a few wears, and that extra stretch pulls on the gi\u2019s inner fabric, making the gi lose its shape faster. A good gi should last you 2-5 years if you take care of it, but wearing a tee under it can cut that lifespan in half. That\u2019s a waste of money, right? Especially if you\u2019re buying quality gi like the ones we make, not a cheap knockoff that falls apart after one practice. Wait, but what about when you\u2019re doing judo at home? Like, if you\u2019re just practicing throws on your mat in your garage, no dojo around. Is it okay then? Even there, I\u2019d say think twice. Yes, you can wear the technical tee if you\u2019re super cold, but cotton is still going to absorb sweat and make you uncomfortable long-term. We actually recommend our lightweight training gis for home practice\u2014they\u2019re thin enough that you don\u2019t overheat, but still durable enough to handle self-practice. And you get the same grippy benefits that judo is designed for. Let\u2019s wrap this up with a clear, no-nonsense answer: Is it okay to wear a T-shirt under a judo gi jacket? Mostly no, unless it\u2019s a tight, moisture-wicking technical tee for casual, non-competitive practice (and even that\u2019s only if your dojo allows it). Regular cotton tees? They mess with grips, get heavy when sweaty, damage your gi, and put you at a competitive disadvantage. The only time a layer is worth it is if you\u2019re training in freezing temperatures, and even then, skip the tee\u2014use a thin spandex layer made for sports. Now, as someone who works with judo gis every single day, I get that adjusting to no extra layer can feel weird at first. I remember when I first stopped wearing my cotton tee, I felt like I was naked under my gi for the first week. But once I got used to it, I noticed a huge difference: my grips were way more solid, I didn\u2019t have to adjust my gi mid-practice anymore, and my gi lasted way longer than my old ones. If you\u2019re tired of fighting with layers, or you\u2019ve been struggling with bad grips and slippery gi fabric, maybe it\u2019s time to take that tee out and give the gi jacket a chance to do what it\u2019s designed for. And hey, if you\u2019re in the market for a new gi that works perfectly with judo\u2019s rules\u2014no weird layers needed\u2014hit us up. We make gis for all levels, from beginners just stepping on the mat to seasoned competitors, and we know exactly what works for grip, durability, and comfort. Whether you need a lightweight training gi, a heavy tournament gi, or even those thin spandex layers for cold dojos, we\u2019ve got you covered. Just reach out anytime to chat about what you need for your training, no pressure, no weird fine print. At the end of the day, judo is about respect, both for the sport and for your training partners. Wearing the right gear isn\u2019t just a rule\u2014it\u2019s part of that respect. So ditch the cotton tee, and let your gi do its job. Now, go hit the mat. Qingdao Chido Sports Products Co., Ltd.<\/a>
\nReferences Judo Gi<\/a><\/p>\n![](\"https:\/\/www.chidosports.com\/uploads\/44038\/small\/lightweight-jiu-jitsu-gidbf4a.jpg\")
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