Mares R2S First Stage – Simple, Reliable, and Built for Everyday Diving The Mares R2S First Stage is designed for divers who value reliability, simplicity, and low-maintenance performance. Compact and durable, this piston first stage delivers smooth, consistent airflow — making it the perfect choice for recreational divers, dive schools, and travel setups. Simple Piston Design – Robust and efficient for easy maintenance and long-term reliability. Stable Airflow Delivery – Ensures smooth, comfortable breathing across all dive conditions. Lightweight and Compact – Ideal for travel and frequent use, offering easy packing and handling. Durable Chrome-Plated Brass Body – Corrosion-resistant and built for long-lasting performance. Perfect for Recreational Diving – Affordable and dependable, a great option for beginners and rental operations. Dependable, efficient, and easy to maintain — the Mares R2S First Stage offers great performance at a great value. Available now at Scuba School of America.