• IST Piston 1st Stage
• IST 0-10 adjustable 2nd stage
• The breathing tube is made from a special Polymer resin, which allows the second stage to remain neutral in the water
• The benefit is less jaw fatigue and a more comfortable dive
• The rocker arm lever is made from stainless for smooth action and controlled breathing
• Our reflection system, which can be viewed inside the mouthpiece, directs air towards the mouth to create a swirling Ventri for smooth natural breathing
• The dynamic adjusting orifice is made from brass for a soft touch seal and air operation

Performance Data

• Inhale pressure: 12.86mbar
• Inhale pos pressure: 4.91
• Exhale pressure: 10.11mbar
• Ext work of breath: 0.72 J/I
• Inhale work: 0.22
• Pos inhale work: 0.10
• Exhale work: 0.65