m3 gas mask history for Dummies
If additional nose Room is necessary, Hollis provides a snorkel mask that should satisfy those wants without staying cumbersome or unsightly. The Hollis M1 is a frameless diving mask with a one hundred% pure silicone skirt. It's a very low profile and will fold flat for packing. The silicone skirt on this mask is adaptable and does not Possess a r