The key design and durability improvement for the new Pixel 10 Pro Fold is its achievement of full IP68 dust and water resistance, making it the first folding phone with such a rating. This gives it enhanced protection against dust and water, similar to other top-tier phones. Additionally, the hinge has been redesigned to be gearless, made of steel, and twice as durable as the previous generation, with Google claiming it can handle over ten years of folding. The phone's frame is crafted from aerospace-grade aluminum, and the screen features ultra-thin glass with two layers of anti-impact film for added drop protection, contributing significantly to its durability improvements.

In summary:

• Full IP68 rating for dust and water resistance.
• Gearless steel hinge, twice as durable as Pixel 9 Pro Fold's hinge.
• Aerospace-grade aluminum frame.
• More durable Super Actua Flex Display with ultra-thin glass and anti-impact films.
• Designed to handle over 10 years of folding.

These enhancements focus on making the Pixel 10 Pro Fold more robust and resilient in real-world use compared to its predecessor.