It is not as snug as other frameless masks like the Cressi F1 mask. We believe Hollis have tried using to boost rigidity of your mask for sturdiness and safety by strengthening the skirt material meaning it could pinch and dig if the mask is just not a ideal healthy https://italianm35gasmask05050.aboutyoublog.com/29346994/the-definitive-guide-to-silicone-zombie-mask