Uniqlo Full Open Polo Shirt Airism Size XL size Khaki Item Number 341-447816 - Uses Airism with dry function. - The sleeve length has been slightly extended for a neat silhouette, considering the overall balance. - The outer stitching has been changed to a more delicate filament yarn to match the material. - The outer circumference of the upper collar has no outer stitching, and the seam allowance is held down with an inner edge stitch. - The armholes are neat without stitching. - The full-open shirt-like design can be used both on and off. - Airism with dry and cool-touch functions, so it feels smooth and cool on the skin.