Our Flex collection of polo and button down shirts were made for the man on the move. The fabric is made from a cotton blend jersey knit that feels incredibly soft against the skin. It also stretches in every direction making these shirts absurdly comfortable and effortlessly practical.
Like all of our polo shirts, these have a modern fit that is gently hugs the arms but gives plenty of room in the chest and stomach. Some premium details include a straight hem with side slits and innovative under-collar buttons to keep the collar neat. They are tailored to fit shorter men perfectly, thanks to a shorter overall length.
Update: Straight hem with side slits for movement
Modern fit features slim sleeves and room to breathe in the body
Flex knit fabric is comfortable, stretchy, and soft
46% Cotton 46% Polyester 8% Spandex
Small spread collar with hidden button to keep collar neat
3 button closure
Perfect for the golf course or casual wear
Short Sleeves
Machine wash in cold water, air dry only
Imported
Runs True to Size - Order your typical shirt size from Under 510. Our polo shirts are cut for a contemporary look; slim in the sleeves with room in the body for drape and breathability. Made in a shorter length to fit short men.
Free U.S. Shipping for Orders $150+
Enjoy complimentary shipping on orders of $150 or more to all 50 US states.
Free U.S. Shipping for Orders $150+
Enjoy complimentary shipping on orders of $150 or more to all 50 US states.
Our goal is to deliver a near perfect 'WOW' fit for men Under 5'10. Enjoy free shipping on U.S. orders over $150, along with easy, free U.S. returns and exchanges. Experiment with various sizes and styles on your first purchase to discover what works best for you. With 24/7 round-the-clock support from our devoted customer support team, we're committed to ensuring your absolute satisfaction with every purchase.
Perfect Fitting Clothes
Our goal is to deliver a near perfect 'WOW' fit for men Under 5'10. Enjoy free shipping on U.S. orders over $150, along with easy, free U.S. returns and exchanges. Experiment with various sizes and styles on your first purchase to discover what works best for you. With 24/7 round-the-clock support from our devoted customer support team, we're committed to ensuring your absolute satisfaction with every purchase.
I absolutely love these shirts! I got the medium I’m 5’ 2” and weigh 155 lbs and as you can see if it fits me so nicely! I’m definitely gonna purchase more.
How it fitsRated 0.0 on a scale of minus 2 to 2
Runs Small True to Size Runs Large
JN
Jayce N.
Verified Buyer
What is your height? 5'2"
How old are you? 26-30
What is your weight? 120-130lbs
What is your body type? Athletic
4 months ago
What is your height? 5'2"
How old are you? 26-30
What is your weight? 120-130lbs
What is your body type? Athletic
Reviewing
Flex Short Sleeve Button Down Shirt Navy
Rated 5 out of 5 stars
Great for a small transgender guy
Love the fit. I'm 5' 2" and weigh 120lbs and I'm in good shape with natural muscle mass and this shirt fits perfectly. It affirms my gender identity and the quality of the shirt is amazing. Stretchy, nice cut, and breathable. I'm diggin" it and I will definitely will be picking up some more. Would love to see an army green. Thank again under 510! I've been struggling to find a true masculine pro outerwear. And you made my dream come true. Peace!
How it fitsRated 0.0 on a scale of minus 2 to 2
Runs Small True to Size Runs Large
J
Jeff
4 minutes ago
Reviewing
Flex Short Sleeve Button Down Shirt Gray Mist
Rated 5 out of 5 stars
5 Stars
good button shirt, this is the one im looking for
NL
Nox L.
Verified Buyer
What is your height? 5'2"
How old are you? 31-35
What is your weight? 120-130lbs
What is your body type? Normal
4 days ago
What is your height? 5'2"
How old are you? 31-35
What is your weight? 120-130lbs
What is your body type? Normal
Reviewing
Flex Polo Gray Mist
Rated 4 out of 5 stars
True to size
I never find clothes that fit. Finally a shirt that fits! Soft