Just like your LifeProof iPhone case, the LifeProof iPhone Armband is ready for action and built to withstand seawater, dirt, snow and high vibration environments. What’s more, the LifeProof iPhone Armband keeps all buttons and features of your iPhone accessible - even the speaker and microphone. When you want to take your iPhone along for all the fun, be sure to do it with the ultimate workout companion – the LifeProof iPhone Armband. Your LifeProof iPhone Armband is compatible with the iPhone 4s / 4 LifeProof case (sold separately) Thick padding protects your skin and delivers comfort during workouts Non-slip silicone dots keep your iPhone armband in place during long activities Adjustable armband accommodates 10” to 15.2” biceps Smooth waterproof spandex material is perforated for exceptional breathability Wide, 65mm strap provides outstanding stability for your LifeProof iPhone case Weighs just 2.1 ounces, so it won't slow you down The rugged cradle boasts lightweight honeycomb construction with premium high-impact materials for optimal strength-to-weight ratio Lets you choose phone-facing-in or phone-facing-out orientation One-handed release latch for fast insertion and removal of your LifeProof iPhone protective case Integrated lock-switch to secure your iPhone firmly in place Well-thought design ensures all iPhone buttons and features are accessible in the mount, including speaker and microphone Compatible with Bluetooth headsets Suitable for any use in any weather, seawater, dirt, and snow, including high vibration environments