On eligible products*, you can select either a one-time purchase or subscription option. To subscribe to the product simply choose the subscription option when adding the item to your cart and checkout.
When adding the item to your cart, you can also select the frequency you'd like to receive your items (every 30, or 60 days).
*If you do not see the "Subscribe and Save" option when adding an item to your cart, it means the item is not eligible for a subscription.