The TendHer Perineal Pack consists of 2 super-soft and smooth all-natural gel packs with 5 sleeves which can be reused or tossed for convenience. The gel packs are made in an FDA-registered facility in the US and are each tested carefully, so feel free to sit on them however you like. More importantly, the gel packs are made of all natural ingredients with no artificial additives, so it won’t harm your tender areas. The sleeves are made of high-tech, quick-dry, wickaway fabric meant to pull fluids from your body onto your maternity pad. They can be tossed if desired, or reused by simply washing in cold water and hanging to dry. The gel packs can be warmed in a bowl of hot water and used warm during childbirth to help relax perineal muscles, or used cold in 20 minute sessions after birth to help with recovery. Regardless the usage method, we recommend using with a sleeve to protect your skin from a warm or cold pack. No microwave and no boiling water on the gel packs!