In reply to exiled_northerner:
The Lifedge case is easy to snap on and off - see here:
I have one for the iPhone 5s and it's withstood fairly harsh Scottish winter conditions. The enlarged button on the side allows you to take photos easily when wearing gloves. I wouldn't have paid the original price of £70 but it was a bargain at half price. I remember reading a direct comparison with the Lifeproof case and there wasn't much to call between them, but the Lifedge just edged it.