The Eco posh OBV Newborn Fitted Cloth Diaper is designed to fit preemies and newborns ranging from 4 -12 pounds. The Eco posh OBV Newborn is made from organic cotton, bamboo velour (viscose of bamboo rayon) and recycled water bottles. The Eco posh OBV Newborn features a snap-in organic bamboo velour (viscose of bamboo rayon) insert that is four layers thick allowing for more thorough cleaning and faster drying time. The Eco posh OBV Newborn is a fitted diaper, which is not waterproof. This diaper requires the use of a diaper cover, such as the Eco posh Wool Diaper Cover (sold separately). This diaper is the perfect solution for nighttime use or heavy wetter’s. Eco posh OBV, complete with the snap insert, is an absorbent seven layers thick! PREP: Prior to first use; wash Eco posh OBV Newborn twice through a full wash cycle in hot water (no detergent) with a cold rinse, tumble dry medium. This will shrink diaper and pad to appropriate size and “sponge” up fabric for maximum absorbency. Fullest absorbency will be reached after five washes. The diaper may begin to be used after two washes. TO USE: Snap in the absorbent pad. If baby’s cord stump is still present, snap-down the cord care feature. Fasten diaper to baby. This diaper needs a cover so we recommend the Eco posh Wool Cover or the Rumparooz Newborn Diaper Cover. WASH & CARE: 1. Cold rinse, no detergent. 2. Hot Wash/Cold Rinse with the suggested amount of detergent. See www.kangacare.com for full list of recommended detergents. Tumble dry medium. Inserts may be dried on high heat.