Racerback Sports Bra Medium To High-Impact Support

Verified claims

Skin safety

Polygiene only targets bacteria on fabric, preserving skin microbiome.

Certifications

Certified by Bluesign and Oeko-Tex for environmental and safety standards.

Value

At $39 CAD, combines Polygiene and REPREVE, premium features at an accessible price.

Ventilation

Laser-cut lining vents heat and sweat during high-sweat workouts.

Durability

Physical laser-cut holes resist washing wear and preserve supportive fit.

Traceability

FiberPrint tracer enables independent labs to verify recycled content.

Carbon footprint

REPREVE yarn has 42% lower greenhouse gas emissions than virgin polyester.

Moisture management

Moisture regain identical to virgin polyester, no performance compromise.

Sizing

Uses generic XS to XL sizing, not standard bra band and cup measurements.

Support

Compression support; black mesh variant recommended for D+ running.

Straps

Fixed-length straps sewn into racerback; no adjustability.

Fabric technology

90% polyester/10% spandex with REPREVE, Polygiene, micro-perf at $39.

Sustainability

Six recycled bottles, 42% lower carbon, tracer-verified recycled content.

Performance

Polygiene odor control lasts the bra's life; micro-perforations never lose breathability.

Fit tradeoffs

Generic XS–XL sizing and fixed racerback straps limit fit for larger cup sizes but include removable padding.

Strap design

Fixed-length straps remove adjustability to keep the bra light and breathable.

Breathability

Laser-cut micro-perforations in the lining provide ventilation while retaining support integrity.

Moisture wicking

REPREVE polyester's moisture wicking is inherent to the polymer and does not wash out.

Micro-perforated lining

Micro-perforations remain intact through washing, preserving breathability and supportive fit.

Odor control

Remains breathable and odor-free through repeated high-sweat workouts.

Product record

Title

Racerback Sports Bra Medium To High-Impact Support

Brand

I.FIV5

Price

39 CAD

Availability

In stock

Polygiene odor control in high-intensity workouts

• Unlike broad-spectrum antimicrobials, Polygiene specifically targets odor-causing bacteria on the fabric while avoiding interaction with the natural bacterial flora on the skin, as confirmed by skin irritation and microbiome testing — so wearing the bra back-to-back or for extended travel won’t disrupt the skin’s healthy balance.
• Real-world stink tests on Polygiene-treated synthetics prove the technology keeps garments odor-neutral far longer than untreated polyester: a Bicycling reviewer wore the same jersey for seven days of curry-fueled runs, climbing, and indoor cycling and a friend called it ‘not bad at all,’ while an Outside magazine tester wore a Polygiene shirt for eight days of running and daily wear, finding it only as smelly as a standard polyester top after a single long run — so this bra can handle consecutive sweaty workouts without immediate washing.
• The active agent in Polygiene is silver chloride, a naturally occurring salt that disrupts bacteria on the fabric through a three-pronged mechanism — binding to cell walls, interfering with DNA, and blocking enzyme energy production — originally developed for hospital contamination control in 2006 and now permanently bonded to the bra’s fibers at the factory, so it stays effective for the life of the garment without washing out.
• Polygiene holds Bluesign approval, ensuring low-impact manufacturing and consumer safety, plus Oeko-Tex Eco-Passport certification for responsible chemical management — meaning the odor control on this bra meets rigorous third-party standards rather than relying on harsh or untested biocides next to skin.

How REPREVE polyester performs in a high-sweat sports bra

• REPREVE polyester's ASTM D1909 moisture regain is 0.4%, the same as virgin PET, meaning the fiber doesn't absorb sweat internally — instead, moisture spreads along the fiber surface and evaporates, which is why the bra stays dry during high-sweat spinning and cross-training even without a distinct wicking treatment.
• Unifi's peer-reviewed 2023 lifecycle assessment shows REPREVE filament yarn yields 42% fewer greenhouse gas emissions, 67% less freshwater use, and 66% less fossil fuel depletion compared to virgin polyester — for someone who values sustainability as a performance metric, this bra carries roughly half the carbon footprint of an equivalent virgin-poly sports bra before it's ever worn.
• Every genuine REPREVE strand embeds Unifi's FiberPrint tracer, a proprietary additive that lets independent labs verify recycled content in the finished fabric, so the claim of six recycled bottles per bra is not just a marketing number but a fully auditable chain-of-custody assurance.

Thin-strap racerback design for high-impact sports

• The racerback cut and thin straps free the shoulder blades for full overhead reach and add an open back for cooling, so the bra stays comfortable during the functional circuits and cardio dance sessions it’s built for.
• The black mesh version is explicitly marketed as offering extra support for high-impact activities, positioning it as the variant most suited to running and HIIT workouts where a locked-down feel is critical.
• The bra teams thick compressive REPREVE fabric with soft removable cups to deliver its medium-to-high impact support, allowing the thin racerback straps to stay minimal for breathability and a clean silhouette without sacrificing hold during spin and cross-training.

How the micro-perforated lining improves airflow

• REPREVE® polyester wicks moisture off the skin, but wicking is only half the equation — the micro-perforations then let that wicked sweat evaporate through the liner rather than saturating it, which keeps the inner cup drier and the bra feeling lighter as a spin class or circuit session wears on.
• Since the micro-perforations are physical openings in the fabric, not a chemical coating, the ventilating effect doesn’t decline with washes — the holes remain unobstructed, so the bra’s cooling and drying performance is stable over the long training season, a meaningful durability difference when compared to bras that rely on topically-applied wicking finishes.
• Because the micro-perforations are cut directly into the lining — not stitched on as separate mesh inserts — the compression layer remains uninterrupted, meaning the bra’s supportive fit doesn’t loosen over time the way it can when stretchy mesh panels start to bag out, and there are no extra seams to chafe.
• The thick, ultra-stretch REPREVE® polyester provides the necessary compressive hold for medium-to-high impact, but dense knits can trap heat — the micro-perforated lining counters this with thousands of pinpoint vents that let hot air and body vapor escape directly through the fabric, preventing the steamy buildup that makes hard intervals feel suffocating.