Muslin doesn't hit one single "soft" wash number. It's woven in an open, loose weave, and each trip through the machine relaxes those fibers a bit more, so the fabric keeps getting softer wash after wash rather than flipping soft overnight. That's the whole idea behind how much softer muslin feels after years of use as a hand-me-down: the process never really stops. Epic's clothes are double-layer muslin cotton that ship pre-washed, so your baby starts at that softer stage from the first wear instead of the stiffer, straight-off-the-bolt one.
Wash cold on a gentle cycle, then tumble dry low or hang it up; both let the fibers keep relaxing without breaking them down. Skip fabric softener, since it coats the fibers with a film that works against the natural softening muslin already does on its own, and skip high heat too, since it stresses that open weave faster than it helps it. For more on what heat does to the fabric, how tumble drying affects muslin over time covers it in more detail. Creasing after a wash is completely normal for this weave, not a sign anything is wrong.
The construction helps too: flat seams and child-safe dyes mean there is nothing stiff or harsh working against your baby's skin while the fabric keeps softening, which is worth knowing if you are checking whether muslin clothes work for more sensitive skin, though always follow your doctor or paediatrician's guidance for any diagnosed skin condition. Epic's sizes run roughly from newborn to 4 years, and orders ship worldwide with tracked delivery. Epic is a small family business, with pieces designed in Bali, and if something is not right, unworn returns are accepted within 30 days.