What are BJJ spats? Fit, use, and difference from leggings

BJJ spats are close-fitting, elastic training pants for grappling and No-Gi BJJ. They are worn as a flexible layer over the legs, often under grappling or MMA shorts, and are designed to stay close to the body during scrambles, guard work, and takedowns.

At first glance, spats look like regular sports leggings. In practice, grappling places different demands on fit, material, seams, and waistband. During BJJ, the fabric is constantly stretched, slid across the mat, and subjected to body weight. A good spat must therefore not only be comfortable, but above all continue to perform well when you move.

In this guide, you will learn exactly what BJJ spats are, when to wear them, how they should fit, how they differ from regular leggings and compression shorts, and what to consider when using them in training and competition.

What are spats in BJJ?

Spats are full-length compression tights that run from the waist to around the ankles. In BJJ, submission grappling, and MMA, they are primarily used as a close-fitting training layer for the lower body.

The principle is simple: as little loose fabric as possible and as much freedom of movement as possible. During techniques such as shrimping, inversions, triangles, wrestling shots, and leg pummeling, you do not want a pant leg to twist or bunch up. That is why spats are generally made from elastic synthetic fabrics that stretch in multiple directions.

The Tactical Fightwear HEXCORE Spats, for example, are made of 80% polyester and 20% spandex and were developed for MMA, BJJ, and grappling. The product line is available from S through 2XL.

BJJ spats versus regular leggings: what is the difference?

The terms are sometimes used interchangeably because both garments fit closely and are elastic. However, their intended use is different.

Standard fitness leggings are usually designed for activities such as strength training, running, or general gym workouts. Grappling places different demands on clothing: frequent contact with the mat, pressure on the knees and hips, fabric being pulled, and movements in which the legs bend and rotate significantly.

That is why, with BJJ spats, you should pay extra attention to:

• stretch: the fabric must follow deep hip and knee flexion without pulling excessively;
• stable waistband: the pants should not keep slipping down during scrambles;
• flat seams: thick or poorly placed seams can cause irritation during prolonged ground work;
• quick-drying material: useful during intense sessions with a lot of sweat;
• close fit: excess fabric can twist or bunch up during grappling.

That does not mean every regular pair of leggings is unsuitable. It mainly means that spats for mat training should be chosen based on how they perform under grappling stress, not just how they fit when standing.

When do you wear spats for No-Gi BJJ?

In No-Gi, spats are often worn under grappling shorts. This combination provides the freedom of movement of shorts with a close-fitting layer over the legs.

That extra layer can be particularly comfortable during guardwork and wrestling-heavy rounds. Your knees, shins, and hips make a lot of contact with the mat, while the fabric must move with you during hooks, frames, and rapid changes of position.

Spats are not required for every regular gym training session. Some athletes prefer to train only in shorts, while others almost always wear a full-length compression layer. The best choice depends on your preference, training environment, and gym rules.

If you want to explore the complete outfit involving a rash guard, shorts, and compression clothing, also read our complete guide to what to wear for No-Gi BJJ. That article covers the entire training set; this guide focuses specifically on spats.

Do you wear BJJ spats under shorts or without shorts?

For training, you will see both options. Spats under MMA or grappling shorts are a popular setup because you combine a close-fitting base layer with a loose outer layer.

Whether you can wear spats without shorts depends on the gym and, especially, the competition organization and division. Competition rules are not the same worldwide and can change. Therefore, always check the current regulations of the specific organizer before putting together a competition outfit.

For daily training, comfort is a good practical test. The shorts and spats should be able to move together without making the waistbands unnecessarily bulky or pulling the inner layer down.

Spats or compression shorts: which should you choose?

The biggest difference is the amount of coverage. Compression shorts usually reach about halfway down the thigh, while spats cover most of the leg.

Choose spats when you:

• find a full-length layer comfortable during ground work;
• do a lot of guard work or have frequent leg-to-mat contact;
• prefer to wear one close-fitting layer from the waist to the ankle;
• want more coverage in a cooler training environment.

Choose compression shorts when you:

• want less coverage;
• warm up more quickly during training;
• are mainly looking for a close-fitting base layer under MMA shorts;
• prefer to keep the lower legs uncovered.

Within the Compression Shorts & Spats collection, you can compare both types of base layers side by side.

How tight should BJJ spats be?

Spats should fit closely, but they should not restrict your normal range of motion. A good compression fit feels secure without sharp pressure, numbness, or a waistband that cuts deeply into the skin.

Do not test the fit only while standing upright. At home or during your warm-up, perform a few movements that resemble the actual sport:

• a deep squat;
• knees toward your chest;
• a wide lunge;
• hip escapes;
• technical stand-ups;
• a few controlled sprawls.

The waistband should stay in place, and the fabric should not bunch up significantly behind the knees. The pants should remain comfortable even at maximum hip flexion.

What size BJJ spats do you need?

Always use the specific brand’s size chart and do not automatically assume the same letter size as for loose training pants. Spats are intentionally designed to fit more snugly.

A size that is too large may shift or bunch up during rolling. A size that is too small can place unnecessary tension on the seams and waistband and reduce your freedom of movement.

The HEXCORE Spats are currently available in S, M, L, XL, and 2XL. Choose based on the current size chart on the product page, then check the fit with sport-specific movements.

Which materials are practical for grappling spats?

Polyester and spandex are widely used in technical compression wear. Polyester can be lightweight and relatively quick-drying; spandex provides the stretch needed for the fabric to move with you.

For BJJ, the material percentage is not the only important factor. The overall construction determines how spats feel. Pay attention to the combination of stretch, waistband, seams, and how quickly the fabric returns to shape after being stretched.

Avoid pants that become see-through when you squat deeply or put the fabric under significant tension. Check this before taking them to the gym, especially if you want to wear the spats without an additional outer layer where permitted.

Can you also wear spats under a BJJ gi?

Some athletes wear compression garments under gi pants for extra coverage or comfort, but gym and competition rules may differ. Competition regulations in particular may set specific requirements for what is allowed under a gi.

For competitions, therefore, never use your training routine as your only reference point. Check the rules of the organization and division in which you will actually compete.

If you train both Gi and No-Gi, it is useful to understand the broader difference between the disciplines. Our guide to MMA, BJJ, and grappling explains the main training contexts.

How do you combine spats with a rashguard and MMA shorts?

A practical No-Gi setup often consists of three simple layers: a rashguard on top, spats or compression shorts as a base layer underneath, and grappling or MMA shorts over them.

The garments should not work against each other. A rashguard that is too loose and spats that slip down will make you keep adjusting your outfit during every round. Therefore, check the entire combination while moving.

If you wear a rashguard and are unsure which sleeve length to choose, you can also use our comparison of short- or long-sleeve rashguards.

How do you wash and care for BJJ spats?

Wash grappling spats after every intensive training session according to the care label. Do not leave sweaty clothing wet and rolled up in your sports bag for an extended period.

The current washing instructions for the HEXCORE Spats are: hand wash in cold water, do not bleach, do not iron, and air-dry. Always follow the instructions for your specific product, as materials and prints may vary by model.

Also check the seams and waistband while washing and drying. If you notice significant wear or small tears, it is wise to assess this before your next intense grappling session.

Common mistakes when choosing BJJ spats

• Choosing based only on appearance. During rolling, stretch and fit are more important than the print.
• Choosing a size that is too large because compression wear feels tight. Excess fabric can shift during grappling.
• Choosing a size that is too small for “more compression.” More tension is not automatically better.
• Trying them on only while standing. Always test the hip and knee movements you use on the mat.
• Assuming competition rules based on gym training. Always check the current regulations for your event.

Conclusion: when are BJJ spats a good choice?

BJJ spats are especially practical when you want a full-length, close-fitting layer over your legs during No-Gi or grappling. They should move with your body, stay secure at the waist, and provide enough stretch for guard work, takedowns, and scrambles.

Don’t think of spats as a complicated performance product. The most important features are actually simple: a good fit, freedom of movement, durable material, and construction that stays in place during mat training. Choose the size based on the product chart, test the tights with real grappling movements, and always check the current clothing rules before competitions.

Frequently asked questions about BJJ spats

What are spats in BJJ?

Spats are close-fitting, full-length compression tights worn for BJJ, No-Gi, and grappling. They generally run from the waist to around the ankles and are designed to stay close to the body during movement.

Do you wear spats under BJJ shorts?

Many athletes wear spats under grappling or MMA shorts. For training, the exact setup depends on personal preference and gym rules.

Are BJJ spats the same as leggings?

They are very similar, but BJJ spats are chosen for the specific demands of mat training: plenty of stretch, friction, ground contact, and movement from the hips and knees.

How tight should grappling spats be?

Close-fitting without restricting your freedom of movement. The waistband should stay secure, and the fabric should not bunch significantly during squats, hip escapes, or other grappling movements.

Are you allowed to wear spats during a BJJ competition?

This varies by organization, governing body, and division. Before every match, check the organizer’s current uniform regulations.