Doublers add absorbency to a diaper without adding bulk or drying time to the actual diaper. Useful for heavy wetters and nighttime diapering. Simply lay doubler inside diaper before snapping onto baby. Doublers are absorbent without excessive bulk, made up of one layer of unbleached knit terry and a layer of soft cotton fleece, slightly tapered for easy fit between the legs and also designed to fit any size diaper.