AIO’s, AI2’s and Pockets are available in 4 different sizes: Newborn (Fits Approx 5-16+ lbs), Flawless (Fits Approx 7-32+ lbs), Flexfit (Fits Approx 9-42+ lbs) or Hipster (Fits Approx 20-50/55+ lbs) PUL Outer with AWJ Inner PUL Outer with Wipeable PUL Inner (AI2 with Wipeable PUL inner Only) AIO has a sewn in snake style soaker and snap on booster AI2 has a snap in snake style soaker and snap on booster Pocket had a snake style soaker and snap on booster Covers Only available in Newborn (fits approx 5-16+lbs) and Flex FullFit (fits approx 9-42+lbs). They DO NOT come with a soaker or booster. Best used for OVER Hybrid Fitteds, Fitteds, Preflats and the like. PUL Outer with Wipeable PUL Inner Hybrid Fitteds are available in 4 sizes: Newborn (Fits Approx 5-16+lbs), Petite (Fits Approx 6-26+lbs), One Size (Fits Approx 12-45+lbs), Toddler (Fits Approx 20-60+lbs) Cotton Lycra or Poly Interlock Outer Hidden Layer of Windpro Fleece. Helps push moisture back into the soaker system Cotton Velour Inner Layer Fold Over Soaker and Booster A cover is required to be completely waterproof, but many can go 2-3 hours without a cover. Comfort Serged, Serged, or Turned and Top Stitched Finish Fitteds are available in 4 sizes: Newborn (Fits Approx 5-16+lbs), Petite (Fits Approx 6-26+lbs), One Size (Fits Approx 12-45+lbs), Toddler (Fits Approx 20-60+lbs) Bamboo Stretch French Terry Outer Bamboo Stretch French Terry Hidden Bamboo Stretch French Terry Inner Fold Over Soaker and Booster A cover is required to be waterproof, but many can be worn without a cover for cover free time. 💯 absorbent Snap or Snapless Closure Comfort Serged, Serged, or Turned and Top Stitched Finish Preflats are available in 3 sizes: Newborn (Fits Approc 6-20+lbs), One Size (Fits Approx 10-35+lbs), Toddler (Fits Approx 25-60+lbs) 2 Layer Bamboo Stretch French Terry Choice of Lay in Soaker or Sewn in Soaker Contours are available in 2 sizes: Newborn (Fits Approx 5-20+lbs), One Size (Fits Approx 12-30+lbs) 2 Layer Bamboo Stretch French Terry Choice of Lay in Soaker, Sewn in Soaker, or Trifold