Muslin is cotton woven in a loose, open weave. That weave is what makes it breathable and quick to dry, and it's also why the fabric gets softer with every wash instead of wearing out. Don't worry if it creases in the wash or the dryer, that's just how a loose weave behaves, not a sign anything is wrong.
Our clothes are double layer muslin cotton, so they hold up to the stretching, crawling, and constant washing that comes with a baby's first few years. We pre-wash everything before it ships so it arrives already soft, sew with flat seams so there's nothing scratchy rubbing on skin, and finish with child-safe dyes instead of harsh treatments. Sizes run from newborn up to about 4 years, and the fabric keeps its softness and shape as your child moves up through them.
To keep it lasting, wash cold on a gentle cycle and either tumble dry low or hang it to dry. Skip fabric softener and high heat, both wear down the weave faster than normal use ever would. We're Vanessa and Bob, we design this in Bali and ship worldwide with tracked delivery, and if something isn't right, unworn items can go back within 30 days.