Simplicity combined with important features results in the second HR stage. The body in technopolymers, the regulation of the respiratory effort and the possibility of being opened underwater place it in the world of technical diving. It is sought after in the market to be used for: stage, sidemount or inserted in backmount configuration.

Mares has designed the second stage HR, for the purpose of enriching their offer with a simple item, yet fitted with important features. The technopolymer body makes it ultra-light, and offers it a very important aesthetic character. Regulations on the respiratory effort and the possibility of being open underwater places this device in the world of technical diving. Finally, its flexibility in use makes it highly sought after in the market for: stage, sidemount or inserted in backmount configuration.

The key features of the 2nd Stage HR are:

• Suitable for stage, sidemount, rear main, reserve or "hard breathing" configuration
• Breathing effort adjustment
• Simple, ultralight and excellent performance technopolymer body
• Pad - pneumatically assisted design
• Flush button oversized
• Miflex XT-Tech hose
• Can be opened and cleaned or adjusted under water