This is made of 5.0 oz., 100% combed ringspun cotton with a 1x1 baby rib and double-needle stitched rib binding on the neck and armholes. The white version is sewn with 100% cotton thread and the heather version is made with 93% cotton / 7% polyester. Here are the available sizes:

• XS (0-4 lbs)

• S (5-10 lbs)

• M (11-23 lbs)

• L (24-45 lbs)

• XL (46-70 lbs)

For breeds with larger chests, purchase one size up from the weight range.