Every Invisalign user is mandated to wear their trays for 20 to 22 hours each day. So, you have 4 hours of freedom in a day. The normal thing is that you should only take out your trays when you want to eat, snack, brush, drink, floss, or play contact sport. #InvisaligndiscountLondon, #cheapinvisalignLondon, #cheapestInvisalignLondon, #invisalignoffersnearme