Every flag on every boat fails in the same place, and understanding why makes the buying decision obvious.

What is actually happening

The hoist edge is held along its length. The fly edge is free, and in any breeze it cracks back and forth thousands of times an hour.

That is not abuse, it is the flag flying. The fabric at that edge takes an enormous number of small flex cycles and eventually it lets go.

What good construction does about it

Four rows of stitching along the fly rather than one or two, and a reinforced patch at the fly corners where the load concentrates.

That does not stop fraying — nothing does — but it moves it from weeks to a season or more.

What makes it worse

Oversizing. Too much cloth for the rig flogs harder and wraps around rigging, which is another reason the size convention exists.

And leaving a flag up permanently. A flag flown only when the boat is in use lasts several times longer than one left flying at a mooring all season.

The honest expectation

A well-made flag in regular use is a consumable with a life measured in seasons, not decades.

Anybody promising otherwise is describing a flag that never gets flown.