NEWBORN FIT: HappyEndingsTM Newborn 4 Layer Hemp & Organic Cotton Fleece inserts are perfect for Heavy Wetters! These inserts fit all Newborn sized cloth diapers, with measurements of 11in. by 4 in. These are not pre-washed, so up to 1-1.5 inches of shrinking can be expected. USE: Hemp is meant to be used as a doubler -it is the most absorbent natural material, but it also absorbs slowly, so we recommend using a bamboo or microfiber insert on top of your hemp one. NATURAL BENEFITS: Hemp contains antimicrobial qualities. Hemp and cotton are naturally hypoallergenic fibers. MATERIALS: 55%hemp/45%organic cotton fleece. CARE: Wash on warm heat. Dry on low heat (do not over-dry) or lie flat to dry. Although some shrinkage of the fabric around the edges of hemp/cotton is common, over-drying or washing/drying on high heat can cause extreme shrinkage in hemp/cotton fabric.