One great way to judge durability is to read customer reviews of daypacks and look to see if anyone notes the durability
The philosophy behind Dennerle is to create a small and tangible, intact piece of nature, in harmony with the natural environment
Beyond that there is a final seal lip (green arrow), but I can't imagine it ever being needed unless the rest of the seal is physically damaged or something
You are always in the driver's seat
Ive found this arrangement to be the best balance for me on the trail, and I then utilize further lightweight stuffsacks if additional organization is needed rather than just throwing the complete contents of my first aid kit randomly in the main compartment of the pack for example
There are certainly some trade-offs to going with the lightest possible boot, namely, support and durability