Name: Arc Maternity Tank with Built-in Belly Band
Rating: 5.00 (3 reviews)

pregnant woman sitting cradling her belly

Arc Maternity Tank with Built-in Belly Band

Black / XS

$78.00

Arc Maternity Tank with Built-in Belly Band

$78.00

Bia + Hera Sizing Guide

Your best fit starts with your pre-pregnancy size. Bia + Hera styles are thoughtfully designed with adaptive stretch and support to accommodate your changing shape throughout pregnancy. For most customers, we recommend ordering the same size you wore before pregnancy.

Size	Bust (in)	Waist (in)	Hips (in)
XS	30-32	23-24.5	33-34.75
S	32-34	24.5-26.75	34.75-36.75
M	34-36	26.75-29	36.75-38.75
L	36-38	29-31.25	38.75-40.75
XL	38-40	31.25-33.5	40.75-42.75

Between sizes? For a more supportive fit, we recommend sizing down. For additional comfort during pregnancy, consider sizing up.

ColorBlack

Size XS S M L XL

Free shipping · Ships in 2–3 business days · 30-day returns

The Arc Maternity Tank is our classic scoop neck tank, elevated with Bia + Hera’s patent-pending belly support design. Crafted specifically to support and flatter your growing bump, it pairs a timeless scoop neckline with an elegant V-back detail for a look that’s as polished as it is comfortable.

Whether you’re running, lifting weights, flowing through prenatal yoga, or simply getting through a busy day, this maternity workout tank moves with you and keeps your belly gently supported. A versatile pregnancy essential designed for all-day comfort, all pregnancy long.

Feature bullets

Patent-pending built-in belly support, with no separate belly band needed
Classic scoop neckline with an elegant V-back detail
Supports your growing bump during running, lifting, yoga, and everyday wear
Flattering fit that adapts to every trimester
Soft, breathable, moisture-wicking fabric
Machine Washable on Delicate Cycle, Hang Dry

Model note: Lily is 31 weeks pregnant and likes to wear a small/medium before pregnancy. She is wearing a size small in the Bia + Hera Arc tank.

Why Bia + Hera

Support without the extra gear

The lift of a belly band and the comfort of a tank, built into one piece you can train in.

Feature	Bia + Hera Built-in support tank	Support belt	Maternity tank
Lifts and supports your bump Takes pressure off as your belly grows	Yes	Yes	No
All in one piece No separate band to buy or put on	Yes	Extra layer	Yes
Stays put while you move No tugging, sliding, or riding up	Yes	Can shift	Often rides up
Breathable for workouts Moisture-wicking, no extra heat	Yes	Adds a hot layer	Varies
Smooth, no bulk Nothing visible under or over clothes	Yes	Bulky	Yes
No velcro, hooks, or straps Gentle on sensitive pregnancy skin	Yes	No	Yes
Looks great on its own From the gym to errands, no cover-up	Yes	Worn underneath	Yes
Support you can wear all day Comfortable enough for workouts and everyday	Yes	Often too tight	No support