Exterior -100% Polyester with Polyurethane laminate. Crossover tabs maximize the weight range. Fold down poppers on the front increase the weight range. Size 1 ? 6 to 18lbs. Size 2 ? 9 to 35lbs Size 2 can be used as a birth to toddler option on bigger babies. Inner Mesh has been removed to make a reusable system with PeeNut Inserts Inner Snap makes snapping in PeeNut Inserts a Breeze! Compatible with Bamboozle Stretch Made in Scotland.