This set combines the  Typhoon smaller Twin lens mask the TM4 with a Drytop medium size snorkel, this set also has the advantage of coming with an optional quick strap retainer to use in place of the silicone strap. This makes it ideal for kids and young people as well as ladies with small faces. The mask has a silicone skirt, and the snorkel has a soft silicone mouthpiece.