2mil Polyurethane Laminated (PUL) Knit Outer - Bottombumpers outer layer is constructed of waterproof 2mil PUL knit outer. Hidden Wing Snaps on Side Snapping Diaper- Bottombumpers keep the wing snaps concealed inside the PUL and lining so they dont touch baby's skin. This also helps prevent red marks. Quality Polyresin Snaps on Side Snapping Diaper- Bottombumpers use high quality industrial strength polyresin snaps. Our snaps are also backed with a layer of fabric inside for extra strength and durability Quality Hook and Loop on Aplix(R) Diaper- Bottombumpers use high quality industrial strength polyresin snaps. Our snaps are also backed with a layer of fabric inside for extra strength and durability Certified Organic Cotton & Bamboo Materials- Nothing says Eco-friendly like a certified 100% Organic Cotton Lining and snap-in soaker material. Our soakers are also topped with a high quality Organic Bamboo Velour, the softest material we've ever worked with. Quick Dry Snap In Soakers- Our soakers are bi-fold and snap-in for quick drying. All snaps are hidden on the soaker as well. Absorbent- Our Diapers have been tested and will withstand 16oz+ before leaking. Testing was done a diaper with no added doubler that was well broken in by being used and washed for 4 months! Made In the USA- Bottombumpers are manufactured in the USA. Made by work-at-home mothers in smoke and pet free sewing studios.