This silicone ‘under-mask’ has been an absolute game changer for my 2.5 year old son. We started having him wear a mask while grocery shopping a little before his second birthday. He would end up sucking on it, resulting in a huge wet circle over his mouth and nose rendering the mask useless and unsafe. There were also times he would just pull his mask off. He would maybe wear it 15 minutes tops. Since we bought this we no longer have the wet mask issue and he will wear it for over an hour. I think the longest was 2 hours at the aquarium. He doesn’t mess with it or complain. It’s been really great for us. The other day at the grocery store, I forgot the silicone part and the wet issue returned, so I do think it makes a difference.