Can I Sleep With A Menstrual Sponge In? Yes, but you need to think if your flow would necessitate changing out your sponge within 8 hours, or however long, before you awake. If you believe that menstrual sponges are the right choice for you and you’ve investigated the health aspects, benefits and risks, we recommend the Natural Intimacy brand of IntimateCare sea sponges. Check them out through these paid #ad links:Amazon in the UK – Amazon in Australia – Amazon in Canada – Amazon in USA Amazon in Germany – Amazon in Spain – Amazon in France – Amazon in Italy As an Amazon Associate we earn from qualifying purchases. You Might Also Like My First Sponge. Where Do I Begin? Mediterranean Or Caribbean Menstrual Sea Sponges? Where Can I Buy Menstrual Sponges In The U.K.?