Flowstate* Core Tank
An essential tank for daily wear with a high neck and our signature Flowstate* blend.
- Flowstate* blend
- High neckline
- Breathable
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).
Material: 90% Polyester, 10% Elastane
Machine wash cold with like colors. Do not bleach. Remove promptly. Tumble dry low. Do not iron.
Exchanges & Store Credit Within 14 Days
All orders are eligible for exchanges or store credit within 14 days of delivery. Items must be unworn with tags attached. If your order arrives damaged or incorrect, just reach out to our customer support team and we’ll make it right.
Questions? Contact us at [email protected] or use the chat. See our full return policy: Return Policy

Features & Details
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.
- CCarolI recommend this productRated 5 out of 5 stars6 months agoLOVE
I’m petite and this XS top fits perfectly! I haven’t found another top that I love the fit as much as this one. I’m sad that it seems to be almost completely out of stock. Please keep it in your line up!
Was this helpful? - NRNicholas R.Verified BuyerI recommend this productRated 5 out of 5 stars8 months agoLove the fit!
I’ve purchased 3 dresses 3 skirts sweatshirts tanks tees hats! I absolutely love the fits. I hate the slow shipping.
Was this helpful? - MMatthewI do not recommend this productRated 2 out of 5 stars1 year ago2 Stars
Beautiful color but way too small
Was this helpful? - PUPaul U.I recommend this productRated 5 out of 5 stars1 year agoIt’s Special
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…
Was this helpful? - BBBrenda B.Verified BuyerI recommend this productRated 4 out of 5 stars1 year agoGreat feel
Love the tank, how it feels and matches perfectly with the skirt. Runs small.
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