This item is from MoveMama Apparel, let's see what they have to say about this item:
"Your wardrobe BF!
The Breastfeeding Full (BFF) Zip nursing tee is a buttery soft and wonderfully stretchy V-Neck tee that features an invisible zipper that is hidden in the stripes at the chest. 90% Cotton, 10% Spandex fabric is perfect for all seasons
This tee is ideal for discreet and comfortable pumping and/or nursing with ease. You'll love the relaxed fit and easy access for feeding your little one. "