Entropy E8 Armband Running Case

$29.99 $34.99
You save 14% ($5.00)
Shipping calculated at checkout.
Strap Size Bundle

The Entropy E8 Armband Running Case is the perfect companion for your workouts. Universally compatible with iPhones, Galaxy phones, Google Pixel, and all other mobile phone brands*, this running armband features a clear touch screen window for full phone access.

With a zippered phone pocket, reflective material for added safety, and a water-resistant memory foam padding, it provides a secure and comfortable fit on your arm while protecting your phone from the rain, dust or drops. Plus, its unique removable strap design allows for versatile wearing options.

The E8 includes two interchangeable straps sizes so it can be worn directly on the arm or over clothing, eliminating the need to have multiple armbands for changing weather conditions.  See Sizing Information below.

*The Entropy E8 Armband fits all smartphones, protective cases & battery cases up to 165 x 90 x 16 mm.


  • Removable straps provide a custom fit on bare arms or over clothing
  • Soft memory foam backing for a secure, comfortable and sweat-proof fit
  • 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, 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)

If your phone is too large to wear comfortably on your arm, we recommend the Kinetic K1 Running Belt.

Please contact Sporteer Customer Service if you have questions about compatibility with your phone or case.