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Questions answered using only confirmed facts regarding 'Backpacks' from RYOO.

RYOO 알와이오오RY-82

What kind of processing is the '4 rounds of PU coating' mentioned in the bag description?

It is a waterproof treatment that applies polyurethane four times to the inside of the fabric to prevent everyday rain or water droplets from easily seeping into the bag.

The number 4 refers to the number of times the waterproof membrane has been layered. PU coating is a processing technique where polyurethane resin is thinly spread on the inside of the fabric to prevent water droplets from seeping between the threads. By repeatedly applying a thin waterproof membrane four times, it achieves basic everyday water resistance to block sudden rain or snow.

Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Official product page ↗Symmetric Codura Backpack #2 [black]Sold Out

RYOO 알와이오오RY-42

What kind of fabric is the 'Cordura' mentioned in the bag's description?

RYOO explains that it uses friction-resistant Cordura nylon for the main body and that it is sturdy enough to withstand sanding with the bag.

This refers to the main body fabric that wraps around the exterior of the bag. The main body of the Symmetric Codura Backpack #2 [black] is made of 100% Cordura nylon. It does not wear out easily. Generally, Cordura is a functional nylon fabric resistant to friction and tearing to the extent that it is widely used in military gear and outdoor bags. Being tougher than ordinary fibers, its threads do not easily unravel even when rubbed against rough surfaces or scratched by corners.

Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Symmetric Codura Backpack #2 [black]
Official product page ↗Symmetric Codura Backpack #2 [black]Sold Out