Navy lace sleeve dress, size M - Brand: SWEET MOMMY - Color: Navy - Material: Lace and polyester - Size: M - Design: Long-sleeved lace Thank you for viewing. Nursing dress The lace part is not pilling, it's designed this way from the beginning. I wore it for a few hours each time for a baby's first shrine visit and a wedding, and then stored it in my closet on a hanger. Please understand this. While in storage, the sleeves have become reddish, possibly from sun exposure (images 2, 3, and 4). It's not noticeable when you put your arms through (image 3), but please refrain from purchasing if you are concerned. Because it's navy with lace, I think it's easy to use without being too heavy in design.