Support level
Our award-winning running bra, engineered to deliver exceptional support, comfort and confidence on every run.
Bounce reduction: Up to 78.6%
The award-winning Ultimate Run Bra in Black has been engineered specifically for runners, delivering our highest levels of support, comfort and performance when you need it most. Designed to help you train with confidence, it reduces breast movement by up to 78.6%*, allowing you to focus on your run, not the bounce.
The bra as been crafted with an the innovative Infinity-8 Support System, developed to counteract the unique figure-of-eight movement experienced during running. Its advanced three-layer construction combines compression and encapsulation to deliver exceptional support from every angle. An inner front panel provides compression, a middle Simplex layer individually encapsulates each breast, and an outer cut-and-sew layer enhances overall stability and control.
Comfort is built into every detail. A soft, seamless inner lining helps reduce friction and chafing, while wide, padded, non-slip adusjtable straps distribute support comfortably across the shoulders. The design features a double back fastening, comprising a hook-and-eye band closure and an upper racerback clip, allowing you to feel secure through every mile.
Made from high-performance, moisture-wicking fabrics, the Ultimate Run Bra features our Dry Action System to help keep you cool, dry and comfortable during intense training sessions. A sports-inspired piqué fabric finish and reflective detailing complete the performance-focused design, making it a must-have for runners of all levels.
Sizing Tip: This style can come up small. We find it best to try a band size up from your normal size. This means if you normally wear a 34D, we recommend trying a 36D.
Style code: S5044/U10046
Product Code: U10046_KK001
Fabric: 195 gsm Stretch Nylon Interlock | 100% Polyamide
Care: Machine Washable
Made in: Indonesia
Step 1 of 3
Step 2 of 3
We'll remember it and adjust it for how each style fits.
Your recommendation
Before you measure
Then type your two measurements below and we'll work out your size.
Around your rib cage, directly under your bust. Snug, and level at the back.
Around the fullest part of your bust (about nipple level). Taut, not tight, and level.
Your measured size
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Recommended in this style
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Enter both measurements to see your size.
| Underband in inches | Band size |
|---|---|
| 27.5 – 29 | 30 |
| 29.5 – 31 | 32 |
| 31.5 – 33 | 34 |
| 33.5 – 35 | 36 |
| 35.5 – 37 | 38 |
| 37.5 – 39 | 40 |
| Difference in inches | Cup size |
|---|---|
| 1 | A |
| 2 | B |
| 3 | C |
| 4 | D |
| 5 | DD |
| 6 | E |
| 7 | F |
| 8 | FF |
| 9 | G |
| 10 | GG |
| 11 | H |
| 12 | HH |
The band around the chest should be level front and back. It needs to be comfortable but firm — a good gauge is being able to fit two fingers between the underband and your skin. Any more space and the band is too big, and could cause friction.
The underband is firm and level the whole way round.
Only a one to two inch give — neither too loose nor too tight.
If the underband rides up at the back, the band is too big.
The cup should contain the whole of the breast, with no creases and no cleavage on show.
Each breast is fully contained.
If the breasts are squashed or cleavage is on show, the cup size is probably too small.
If the fabric is gaping or wrinkling, the cup size is too big.
Sports bras come in different styles, usually a traditional U back or racer back. The straps should be adjusted to fit securely on the shoulders with only one to two inch give.
Slide two fingers between the strap and the skin — there should be only a one to two inch give.
If the straps dig into the shoulders, loosen them until the fit is comfortable.
If the straps fall off your shoulders, tighten them so they sit securely.
Then do the bounce test. Jump up and down on the spot — you should feel supported and secure, with the band staying level.
| UK | EU | US | AU | FR |
|---|---|---|---|---|
| 30 | 65 | 30 | 8 | 80 |
| 32 | 70 | 32 | 10 | 85 |
| 34 | 75 | 34 | 12 | 90 |
| 36 | 80 | 36 | 14 | 95 |
| 38 | 85 | 38 | 16 | 100 |
| 40 | 90 | 40 | 18 | 105 |
| UK | EU | US |
|---|---|---|
| D | D | D |
| DD | E | DD / E |
| E | F | DDD / F |
| F | G | G |
| FF | H | H |
| G | I | I |
| GG | J | J |
Conversions are a guide — cup grading varies between brands. See our full conversion chart for detail.
Two minutes, and it covers the four checks people most often get wrong — the underband, the cups, the straps and the centre panel.
Prefer to read? The full fitting guide covers the same checks.
Whether you're looking for extra support, further recommendations, or simply want reassurance on your fit, we're here to help.
Part of the ACTIVE APPAREL GROUP LIMITED | Company No: 11173403 | VAT No: 927246610 | ©Shock Absorber