Navy long-sleeved undershirt made of stretch material, size 150. - Brand: Under Armour - Color: Navy - Design: Long sleeve - Material: Stretch material YLG is generally a children's size for "Under Armour," suitable for heights of approximately 145-155cm and chest sizes of approximately 70-78cm. Thank you for viewing. The fabric is thin and partially sewn on the lower right side. The back is mesh material. Please check the photos.