Yamatomichi Stretch Mesh Cap Green ..But is it Art? by Steve Moore. The Stretch Mesh Cap is a seriously lightweight mesh cap from Japans Yamatomichi. Designed for when weight (or lack of it) matters, it barely tips the scales without sacrificing functionoffering UV protection and plenty of breathability. That shape memory brim is a nice touch tooallowing it to retain its shape after its been stashed in your backpack.