Gabby Thomas Signature Collection AC Train Bra

$44.99

Gabby Thomas Signature Collection AC Train Bra

$44.99

LONE STAR GREY

Size

Please select size to add to bag.

| Size Guide

Available 04/08/2026 at 9:00 am (US/Eastern)

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Excluded from promotions

The AC Train sports bra provides medium support for dynamic training workouts, keeping you free from distractions. The eye-catching plush band is comfortable and matches with the other pieces in the collection, creating a cohesive and stylish finish.

This version is inspired by NB Athlete Gabby Thomas.

Features

Designed in collaboration with NB Athlete Gabby Thomas
Medium support designed for training activities with intermittent bounce, such as weightlifting, boxing, gym workouts, interval training and cycling
NB DRY fast-drying technology wicks moisture away from your body
Removable pads for customizable coverage
Pullover styling for easy on/off
Plush elastic band with NB logo
Imported

Material

77% recycled polyester, 23% elastane

Style #: WB612123AAQ

Fitted silhouette is form-fitting, designed to feel snug against the body
Size & Fit Guide

Shop all Sports Bras

Gabby Thomas Signature Collection AC Train Bra

Women's

Sports bra size guide

Cup size

size

Band

XXL

Our dedication to craft means that we are always searching for ways to evolve and improve. We know how important a perfect fit is, which is why we've updated our sizing charts to reflect our latest changes. Contact us with questions on how to find the right size.

A woman wearing a sports bra with dotted lines added over the image to indicate where to measure for the right fit.

Step 1: Find your band size

While wearing your best-fitting unpadded bra, wrap a measuring tape around your ribcage. It should be snug, but not too tight. This measurement is your under bust.

Use your under bust measurement and the chart below to determine your band size.

	Band size

	30	32	34	36	38	40	42

cm	64-69	69-74	74-79	79-84	84-89	89-94	94-99
in	25-27	27-29	29-31	31-33	33-35	35-37	37-39

Step 2: Find your bust size

Next, wrap the measuring tape around the fullest part of your breasts. Again, it should be snug, but not too tight. This measurement is your bust.

Step 3: Find your cup size

Subtract your band size from your bust size. Use the difference and the chart below to determine your cup size. For example: Band = 36. Bust = 39. Cup Size = C (39 - 36 = 3 difference). This would be a 36C bra size.

Bust - band difference	2.5 cm 1"	5 cm 2"	7.5 cm 3"	10 cm 4"	12.5 cm 5"	15 cm 6"	17.5 cm 7"

Cup size	A	B	C	D	DD	F	G

Bag

Gabby Thomas Signature Collection AC Train Bra

Gabby Thomas Signature Collection AC Train Bra

Style

Size

Features

Material

Goes well with

Sports bra size guide

Step 1: Find your band size

Step 2: Find your bust size

Step 3: Find your cup size