Why does it take so long to deliver?

Shipping speed on Zasttra depends on many factors. First off, it's not always Zasttra that ships your products. Zasttra, being a marketplace, has other sellers list and sell their products on Zasttra. When an order is placed, a seller is notified to ship the product directly to the buyer or the Zasttra fulfillment centre. The seller's convenience is then the buyers shipping speed although the estimated delivery times are indicated on the product page. In cases where Zasttra itself is the seller, the shipping speed is subject to the availability of the product and buyer location. Usually Zasttra ships much faster than the seller. However, a higher shipping speed is sold at a higher shipping price to facilitate such service, labour and technology.