The RTC Hydro Sponge is a high quality, full size (7.5”X5”x 2”), super absorbent sponge with perfectly uniform rounded edges for maximum moisture absorption on a single pass and ease of use. After much research, RTC has found that aligning rows of sponges is in vacuum sealed plastic is the best way to preserve the original shape for longer periods of time and prevent mold caused by moisture that can deteriorate the sponge cells when sponges are packed in traditional burlap. The RTC vacuum sealed packaging allows sponges to regain their original shape faster, prevents moisture retention before opening and extends shelf life.