It's pretty lightweight so I think it'll transition well to wear with little slides once the weather turns a bit. (witwhimsy.com)
There is a small outdoor play area that just had one little slide in it. (havebabywilltravel.com)
The headphone jack and the charge / sync port are on the top of the phone, and the charge / sync port is covered by a very nice little sliding door as opposed to the standard rubber plug or open port. (brighthand.com)