What role does the undercollar flap mentioned in the hiking shirt description play?
Seeing the structure with buttons and a small piece of fabric attached under the shirt collar may make you wonder about its practical use. This question is asked to determine how to utilize this detail during hikes.
It helps style it as a stand collar that blocks wind and sunlight by fastening and securing it with snap buttons after turning up the collar.
The hiking shirt from HIKER WORKSHOP is made so that the shape of the collar can be changed as needed[1].
The undercollar flap refers to a small fastening fabric attached under the collar. Normally, without fastening this flap, you can wear it with the collar folded down as a neat regular collar[2].
When the wind blows strongly or the sun is harsh, you turn the collar straight up. By bringing the flap together under the raised collar and fastening the SUN GRIP snap buttons, the collar is secured and transforms into a stand collar shape[3][4]. Because it is a snap type that opens and closes with a light press without needing to be put through buttonholes, you can quickly fasten the collar even during a hike to block out wind and sunlight.
The neck circumference measurement when the collar is raised and secured with the flap and snaps has not yet been confirmed.