Not all sports bras are created equal, and the difference between a great one and a mediocre one quickly becomes obvious once you start moving. Beyond choosing the right level of support for your activity (covered in our guide to choosing the right sports bra for your workout), the specific features a sports bra is built with make a significant difference to how it performs and feels over time. Here are the features our fitters look for when helping customers find the right sports bra
Cup Sizing Over Generic Sizing
This is where many sports bras fall short. A bra sized S, M, or L is built to a standardised body width and cannot account for the variation in breast volume across that range. A woman who is a 14F and a woman who is a 14B may both be technically considered a size "large" in a generic sports bra, but their support needs are completely different.
A cup-sized sports bra, sized the same way as your regular bra (for example 12DD or 14G), is designed around your specific breast volume. The cups, straps, support features, and overall construction are proportioned accordingly, resulting in a more secure and supportive fit.
This is one of the biggest differences between specialist bra brands and many fashion activewear brands. Browse DeBra's range of cup-sized sports bras to experience the difference for yourself.
Separation and Bounce Reduction
One of the primary jobs of a sports bra is to minimise breast movement during exercise. Excessive bounce can be uncomfortable, distracting, and make exercise feel far less enjoyable than it should.
A good sports bra should support the bust in a way that feels secure without simply flattening everything against the chest. Many of the best-performing sports bras use supportive cup construction to help separate, shape, and stabilise the breasts during movement, creating both a more comfortable fit and a more natural silhouette under activewear.
Styles like the Elomi Energise Sports Bra and Panache Sport Power Moulded Sports Bra are designed to reduce movement while maintaining comfort, making them popular choices for everything from gym sessions to high-impact training.
Moisture-Wicking and Breathable Fabric
Fabric is often the last thing women think about when buying a sports bra, and one of the first things they notice during a workout. A good sports bra uses performance fabric that pulls moisture away from the skin rather than holding it there - keeping you dry and reducing the friction and chafing that comes with prolonged exercise.
The Glamorise Magic Lift Full Figure Sports Bra is a great example. Designed with moisture-wicking fabrics to help keep you cool and dry, it provides comfortable medium support for activities such as walking, cycling, yoga, and weight training. This combination of breathability and support makes it a great option for lower to medium-impact exercise.
In general, it's best to avoid cotton for exercise, as it tends to retain moisture and can become heavy and uncomfortable when wet.
Flexible Performance Fabrics
A sports bra should move with your body, not against it. This is particularly important for activities that involve bending, twisting, or lateral movement - gym training, yoga, Pilates, team sports. A rigid bra that doesn't flex with the body can quickly become uncomfortable during movement.
Performance fabrics with the right amount of stretch help maintain comfort throughout your workout while still providing the support you need. The Panache Endurance Non-Padded Sports Bra is a great example, using microfibre technology to create a lightweight, second-skin feel that moves comfortably with the body. A breathable centre mesh panel improves airflow, helping maintain comfort during longer training sessions.
A Firm, Well-Positioned Band
Just like an everyday bra, the band provides the majority of support in a sports bra. The straps help position the cups, but the band does most of the heavy lifting.
Sports bras are intentionally designed to fit firmer than many everyday bras in order to minimise movement and improve support during exercise. The band should sit level around the ribcage and feel secure without being uncomfortable. If it rides up significantly when you raise your arms, it is likely too loose.
Because sports bras fit differently to everyday bras, professional fitting can be particularly valuable when choosing one for the first time.
Wide Straps and Adjustable Features
Narrow straps cut into the shoulder under the repeated load of exercise, particularly for fuller busts. Wide or cushioned straps distribute the weight more evenly and prevent the shoulder indentation that narrow straps cause over a long session.
Fully adjustable straps allow you to dial in the right tension for your body, and a J-hook that converts to a racerback pulls the straps inward for extra stability during high-impact sessions. These are small details that matter significantly over the course of a workout.
Supportive Cup Construction
Whether a sports bra is wired or wire-free, the best styles rely on thoughtful cup construction to provide support, shape, and stability during movement.
Many women assume that a wire-free sports bra simply compresses the bust against the chest, but modern designs often incorporate hidden support features that do much more. Internal slings, moulded cup structures, support frames, and specialised panel construction all help create separation, shape, and support without the need for an underwire.
The Panache Sport Freedom Wire-Free Sports Bra is a great example. Its Frame Fit technology creates an internal support structure within the bra, helping to stabilise the bust and provide a more natural shape during exercise. Features like these are often invisible from the outside but make a significant difference to comfort and performance.
Whether you prefer a wired or wire-free style, supportive cup construction is one of the key factors that separates a great sports bra from an average one.
Find Your Sports Bra at DeBra's
DeBra's stocks cup-sized sports bras from Panache Sport, Elomi, Freya Active, Primadonna Sport, Glamorise, and more, in sizes from A cup through to K cup. Whether you're walking, running, lifting weights, playing sport, or simply looking for a more supportive option for everyday activity, our fitters can help you identify the features that matter most for your body and lifestyle.
Browse the full sports bra collection online, or book a complimentary in-store or virtual fitting appointment and let our fitters match you with the right fit, support level, and features for your workout.
