Made with the highest quality softest organic merino wool. Natural textile fibers breath helping prevent diaper rash. Wash by hand with LANACare lanolin-replenishing soap to maintain hygienic effect. Three covers of each size S - L recommended. Best for < 7 lb. For use over inner cotton or hemp diaper. Double-layered panel for maximum absorption where needed most. Natural lanolin content self-cleans wool & removes urine odor. Ribbed leg-openings and waistline accommodate snug fit.