If you’re ever running low on diapers, you don’t need to worry about it. As a Dyper subscriber, all you have to do is hit the SOS button to request a delivery of an additional diaper sleeve. This comes at no extra charge with diapers arriving as soon as 4 hours after you place your order. Rush delivery is only available in certain areas and can take up to 3 business days depending on your location. SOS deliveries are available for subscribers at least once per month and limited to 2 SOS deliveries annually.