All are washed with baby gentle detergent without chemicals, Molly's Suds. My daughter used maybe 3 of those onesies ONCE. The rest we've decided that we only like zippers and magnets. Sleep sack was used maybe 3 times. All are in perfect condition, literally just washed because I washed everything in her closet. There MIGHT be some 0-3 month clothing in there as well. This cost me around $350. The sleep sack alone is $40.