Notes from our factory floor in Longgang, Shenzhen. We write about the EVA material itself, how a custom case is made step by step, and how foam inserts protect the product inside. The same facts we give buyers when they plan an order: MOQ 500 pcs, samples in 1 to 3 weeks, bulk production in 30 to 45 days.
October 24, 2026
EVA is the foam behind most hard shell zipper cases. This guide explains what the material is, why it protects products so well, and how to read its hardness on the Shore C scale.
Read moreOctober 24, 2026
A custom EVA case goes through eight steps before it ships: drawing, mold, lamination, thermoforming, sewing, insert cutting, inspection and packing. Here is what happens at each step.
Read moreOctober 24, 2026
The shell protects your product from the outside. The foam insert protects it from the inside. This guide covers insert materials, how die cutting works, and what to send us when you order.
Read morePlanning a case or a bag? Send a drawing or a photo to info@ztcase.com and we reply with a quote within 24 hours on business days.
