How much fluid does the slip short hold? Customer Support May 28, 2021 10:08 Updated Follow Up to 2 tampons worth of fluid, providing protection for light to moderate flow. Related articles Do I need to wear a pad or tampon with them? How do I choose the right size? Can I wear these as outerwear, like bike shorts? Is the slip short like shapewear? How much fluid do Aisle period underwear hold? Comments 0 comments Article is closed for comments.