X-Pac and Ultra aging process will create crinkles/grid pattern, Ecopak bumps in the fabric over time, some times quicker, some times slower. These materials will also be affected by delamination, just like aquaguard / TPU-coated zippers.

Ultra / X-PAC Crinkles

The images below are from Reddit and here , first one is the AER CPP2 Ultra after 2 months of use, the 2nd one is the Able Carry Daily Plus VX21.

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Delamination

Ultra can also be affected by some extreme delamination, see video here: https://youtu.be/XsR2vojl7sk?feature=shared

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Ecopak Bumps

Ecopak developing bumps, from Reddit:

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Aquaguard Zipper Delamination

While Aquaguard / TPU-coated zippers look sleek and nice out the box, they are also prone to delaminate.

Picture below from Reddit of the aquaguard zippers on a AER TP3