Flowstate* Core Tank
An essential tank for daily wear with a high neck and our signature Flowstate* blend.


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- Flowstate* blend
- High neckline
- Breathable
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Fits small, we recommend sizing up one size.
Cali is 5'7" and wears a size S (Emerald, Lavender Haze).Dee is 5'4" and wears a size S (Black, White, Cognac).
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Material: 90% Polyester, 10% Elastane
Machine wash cold with like colors. Do not bleach. Remove promptly. Tumble dry low. Do not iron.

Flowstate* Freedom
Our super-soft, quick-drying, microvented blend helps your body stay cool and self regulate through long workouts and matches.

Complete Coverage
A performance cut with a high neckline that covers your sports bra and hits right at the waistband.

Sets & Matches
We’ve made matching bottoms for all 5 colors. Check out the Rush Skirt or Tourney Short to complete the set.

This tank is the perfect daily driver. Pickleball, yoga, gym. It can go anywhere.
The Flowstate Core Tank (No. 7231)
There’s a court in the South of France, hidden behind ivy-draped walls, where the clatter of paddles echoes off ancient stone like a secret whispered through time. The players—lean, sun-kissed, defiant—move with a grace that belies the sweat beading on their brows. They wear no ordinary garb. No, they’ve chosen something elemental, something that breathes with them: the Stack Athletics Flowstate Core Tank.
Crafted from a ventilated blend—90% polyester, 10% elastane—this isn’t just a shirt; it’s a second skin for the modern warrior. Moisture-wicking, quick-drying, it laughs in the face of exertion, keeping you cool as the Mediterranean breeze while you lunge for that impossible shot. The high neckline rises like a subtle challenge, a nod to the elegance of purpose, while the solid hues—deep midnight, crisp fog, bold cobalt—pair effortlessly with whatever the day demands.
I wore mine last summer, chasing a rogue pickleball across a dusty court in Provence. The sun blazed, the air thickened, yet the tank held its own—soft as a whisper, unyielding as resolve. Later, over a glass of rosé at a café table, it looked as sharp as it felt, drawing a knowing nod from a passing local who mistook me for a pro. Maybe I was, for a moment.
Fits true to size, they say. Machine wash cold, tumble dry low—practicality masquerading as simplicity. But this is no mere athletic wear. This is a companion for those who live loud, who make noise, who turn a game into a story worth telling. Wear it, and feel the flow.
Love the tank, how it feels and matches perfectly with the skirt. Runs small.
Its really cute, but runs small.
Good product, slow service!
I'm 5'1" and 105 lbs with narrow shoulders (34B cup size). Hard to find shirts that fit my frame and isn't too long—I got this in XS, and it's perfect! Probably fits best on women with a boyish body type.