Vinyl coveringIdeal for functional standing exercisesAdjustable strapsRemovable, washable hand coversIncludes 8 inch pump for inflating ballCleaning and careSimply wipe with a cloth and a mild solution of vinegar (1 part) and water (20 parts)Rinse with waterWipe dryStorage and handlingTuck it away in a dry spot out of direct sunlightInflation instructionsUnzip the cover and align the valve of the inner bladder with the zipper openingUse the pump and included needle to inflate the inner bladderInflate fully and close the zipperNote, when inflating your Twist Ball, do not remove the valve from the ball. Doing so may break the seal, causing sand to leak