KOLON base material summary:Stand-up collar base shirt can block the wind for the neck; the half-zip design is both fashionable and practical, and can lengthen the shoulder and neck lineThe stitching is dense and neat, and the workmanship is beyond wordsThe base shirt uses POLARTEC fabric as the lining, which is soft and light, with excellent warmth retention performance. It can be used as a mid-layer base in winter to provide good warmth retention.It uses warm mixed material, which will not deform or fade when worn casually, has great elasticity and high comfort.Size data