Hemp is a natural substance known for its incredibly absorbent and anti-fungal properties. Although hemp does not absorb as quickly, it can absorb much more than microfiber or other fabrics. That is why the HappyBear hemp booster is a handy insert to add to your pocket diaper. For example, use a hemp insert under a microfiber booster or a bamboo booster. This gives maximum absorption capacity; the first insert can absorb quickly, allowing the hemp insert to absorb the remaining moisture. This way you won't have to worry about leaking diapers.