High Impact, High Comfort.

The WonderBra® Smooth Power collection offers wireless** and underwire*** sports bras designed for serious workouts without sacrificing fit and comfort. With 60% bounce reduction* and convertible straps for a tailored fit, these high-impact sports bras work as hard as you do.

Whether you prefer the freedom of a wire-free sports bra or the structure of underwire support, the Smooth Power collection has you covered.

Built for running, training and every high-impact** workout in between, these sports bras are comfortable enough to wear long after you leave the gym.

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FAQs

What is a high-impact sports bra?

A high-impact sports bra is designed to minimize bounce and provide maximum support during intense physical activity like running, HIIT and boxing. Look for features like wide, convertible straps, a full band and compression cups for the best performance.

What is the difference between a wireless and underwire sports bra?

A wireless sports bra offers freedom of movement with no underwire, making it a comfortable option for high-impact workouts. An underwire sports bra*** has a full-band underwire for additional structure and support, ideal for those who prefer maximum hold. Ultimately, it comes down to personal preference.

Are underwire sports bras good for high-impact workouts?

Yes. A well-designed underwire sports bra, like the Smooth Power Underwire***, can provide excellent support for high-impact activities. Look for minimal seams, a full-band underwire and adjustable straps for the best fit and performance.

How do I find the right sports bra for high-impact workouts?

Look for a sports bra with strong bounce reduction, a secure fit and breathable fabric. Convertible straps and minimal seams are a bonus for comfort and versatility.

Is a wire-free sports bra supportive enough for running?

Yes, when designed for high-impact activity. The Smooth Power Wirefree Bra delivers 60% bounce reduction* and full support without underwire, making it a strong option for running and high-intensity training.

How should a sports bra fit?

A sports bra should feel snug but not restrictive. It should stay in place during movement, with no digging, riding up or shifting. If you're adjusting it mid-workout, or can’t wait to take it off at the end, it's not the right fit.

How should you wash sports bras?

For best results, machine wash cold on a gentle cycle and lay flat to dry. Avoid fabric softener and high heat, as both can break down performance fabric and elastic over time. If hand washing, use a mild detergent and rinse thoroughly. Proper care keeps your sports bra performing longer.

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*Based on 2024 testing by University of Portsmouth Research Group in Breast Health. Percentage stated represents the reduction in overall (forwards/backwards, side/side and up/down) breast movement during treadmill running, as compared to breast movement when wearing no bra.

**E5160 - as rated by 92% of testers in 2024 testing by University of Portsmouth Research Group in Breast Health, when asked to categorise the level of breast support as high, medium, or low, based on treadmill running. Categorizations based solely on subjective participant perceptions.

***E5159 - as rated by 50% of testers in 2024 testing by University of Portsmouth Research Group in Breast Health, when asked to categorise the level of breast support as high, medium, or low, based on treadmill running. Categorizations based solely on subjective participant perceptions.