Air inners out before use. Fluff regularly to maintain the loft and prevent clumping. Routinely air in direct sunlight. Sunlight helps to maintain freshness as it has a natural sanitising effect to kill bacteria.
Avoid washing inners frequently, but when needed, use a cold, gentle machine-wash. Do not soak or bleach.
Drip dry or tumble dry on a low heat. Inners can also be dry cleaned.