Happy Days & Nights 2-in-1 Value Pack gives you the right mix of day and night diapers in one convenient box for the ultimate in around-the-clock protection and value!! And, as an extra value, you get nighttime diaper protection at a daytime price! The patented and exclusive SizeRight feature helps you know the right size for your growing baby or toddler and is available on both the Happy Days and Happy Nights products. In addition, the DriNite liner available with Happy Nights provides the extra absorbency you need for those all night sleepers and extended road trips.