Quick answer

Wash new cloth diapers once in hot water with a small amount of detergent, then dry them fully before use. This removes manufacturing residues and helps fabrics absorb properly. No special prep products are needed.

Why prepping new cloth diapers matters

New cloth diapers often carry natural oils, fabric finishes, or dust from manufacturing that can reduce absorbency or irritate sensitive skin. A single wash with detergent removes these residues. For pocket diapers, the absorbent inserts need this wash to start soaking up urine effectively; without it, liquids may bead on the surface. Swim diapers also benefit from a prewash to remove any factory residue before pool or beach use. Skipping this step is a common mistake that can lead to leaks and frustration.

Step-by-step prep routine

Follow these steps in order. Use a mainstream, fragrance-free detergent; avoid fabric softeners, bleach, and dryer sheets, which coat fabrics and reduce absorbency. Check your diaper's care tag for any brand-specific limits.

Prep steps

  1. Unpack and separate: Remove all packaging and separate diapers from inserts. Check pockets for any loose parts. For swim diapers, remove any temporary tags. Common mistake: washing with packaging still on, which can trap debris.
  2. First wash: Wash on a hot cycle (at least 60°C/140°F) with a small amount of detergent. Use a full wash cycle, not a quick rinse. Checkpoint: water should look slightly sudsy; if not, add a bit more detergent.
  3. Extra rinse: Run an additional rinse cycle to remove any detergent residue. This is especially important for babies with sensitive skin. Common mistake: skipping the rinse, which can leave residue that irritates skin.
  4. Drying: Tumble dry on low or line dry. High heat can damage waterproof TPU and elastics over time. Checkpoint: diapers should be completely dry before use to prevent mildew.
  5. Second wash (optional): For maximum absorbency, especially with natural fibers like bamboo or hemp, wash and dry a second time before first use. Common mistake: assuming one wash is enough for all fabrics; natural fibers often need more.
  6. Test absorbency: After prep, dribble a small amount of water on the insert. If it absorbs quickly, it's ready. If it beads, wash again. Checkpoint: quick absorption means the diaper is prepped and ready for use.

Product facts

  • Fishing Gear-Swimmer: Swim diapers are lined with TPU on the outside and layered with AWJ on the inside, with stretchy waist and leg elastics and snaps for accidents. These materials benefit from a prewash to remove manufacturing residues; the stretchy elastics make the diaper easy to pull up and down, and snaps provide a backup for messes.
  • Mystery Gang-OS: One Size Pocket fits babies approximately 8-35 lbs and features a gray AWJ lining, dirty closure snaps, and a wide 5cm pocket opening. Insert not included. The AWJ lining and pocket opening require a thorough wash to ensure absorbency; the dirty closure snaps let you contain messes before washing, and the wide opening makes inserting absorbent layers easier after prep.