Entropy Modular Galaxy S20+ Armband

$29.99 $34.99
You save 14% ($5.00)
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Strap Size Bundle

The Sporteer Entropy Running Armband is designed to fit the Galaxy S20 Plus with no case or thin* cases.

Entropy armbands feature removable armband straps and soft memory foam backing to provide a comfortable, water-resistant, sweat-proof and secure fit on any arm and ensures your S20+ won't slip down your arm. Two interchangeable strap sizes are included so all Entropy armbands can be worn directly on the arm or over clothing, making Entropy the perfect armband for all seasons.

Entropy Armbands are the perfect way to carry your Galaxy S20 Plus and other small personal items while running, cycling, hiking, weight training, and traveling.

*The Entropy Armband for Galaxy S20+ fits cases up to 165mm X 90mm.

If your case is larger than 165 mm X 90 mm, we recommend the Kinetic K1 Running Belt.

Please contact Sporteer Customer Service if you have questions about your particular case size or arm size.


  • Removable straps provide a custom fit on bare arms or over clothing
  • Soft memory foam backing for a secure, comfortable and sweat-proof fit
  • Edge™ touch screen for full screen visibility and functionality
  • Interior moisture barrier keeps sweat out and your phone dry
  • Locking zippers eliminate annoying rattling during your workout
  • Reflective trim and strap tabs for safe running at night
  • Internal pockets and enough space for cash, cards, keys and ID

TWO strap sizes included:

S/M Bundle:   Includes one Small Strap and One Medium Strap

M/L Bundle:   Includes one Medium Strap and One Large Strap

Strap Size           Arm Size (upper arm circumference)

   Small                          8 - 11 inches (20 - 28 cm)

 Medium                     10 - 14 inches (25 - 36 cm)

  Large                        13 - 18 inches (33 - 46 cm)

Extender                         + 4 inches (10 cm)