Flex Belt

M39 Flex Belt

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  • M39 Flex Belt
  • Flex Belt
  • Flex Belt
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Look your best the whole game with this highly practical, stretchable rubber Flex Belt / hidden shirt tailer. It fits around your hips over your umpire or referee shirt and inside your pants or shorts to keep your shirt securely tucked in. The Flex Belt helps the shirt resist pulling up while also helping to keep the slacks from sagging down.


  • Comfortable and durable soft rubber
  • Increased button diameter to resist pull-through
  • Reinforced end for extra durability not found on flex belts from other manufacturers
  • Lightweight 3.3 ounces
  • Flex belt is one size fits most (Length is 44" and stretches to 46").
  • Available in Creme or Grey


  1. Put on your umpire or referee shirt and, before pulling up your pants, place the flex belt over your shirt just below where your pant's waistband will go. The smooth side should be against your shirt with the pegs pointing out.
  2. Stretch 1-2 inches to pull tight.
  3. Place the button in a hole in a middle row.
    (Note: the trick is that when stretching the belt, place the button through a hole that has been stretched length-wise making it much easier to button than if you had not stretched the belt.)
  4. Once buttoned, trim to the desired length leaving 4" for overlap.

Product Video

Flex Belt Instructions from Manufacturer Hero's Pride

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Customer Reviews


Gordon T.

Dallas, GA.

January 17, 2019
I actually had my game pants altered twice. The flex Belt fits perfect and my shirt stays in my pants. Follow the video and it will make it easier to put belt on. Very pleased with my purchase.

Kevin H.

Hazleton, PA

January 5, 2019
Botton is a little hard to put in but product works great. Bought a second belt to wear for my other job.

Brian B.

Bismarck, ND

August 8, 2018
The grey one I got seems a little rigid and the holes to quite seem big enough to be able to easily use it. Other than that...works as it should.

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