DESIGNED FOR IPHONE X / 10 - This armband is designed to fit the iPhone X with a slim case on (NOT large case). Now includes full screen access for clear Face Recognition. This really is the best running holder on the market today and it comes with our lifetime replacement Guarantee. Great Value, Extreme Protection, Guaranteed Satisfaction SWEAT & WATER RESISTANT - The No1 complaint with other Armbands is that sweat can damage your phone. NO MORE!! Our New ADVANCED Neoprene material will stop sweat from getting to your phone. Also the neoprene is super Grippe and it will NOT fall down your arm during exercise. Don't risk your $$$ Smartphone? Treat yourself to the very best TODAY!! SECURE & FULLY ADJUSTABLE - The secure armband has a dual adjustable arm strap with reinforced stitching 'All the way around' ensuring the Velcro will grip tight and not fall down. The NEW Improved strap fits all arms circumference: Petit Female 8.5'' - 15.7'' Medium Male Arms