About the product
- ?THE PERFECT SOLUTION: Looking for a natural and safe way of increasing your endurance levels and gaining optimal resistance? Surpass your limits and train harder than ever with the COHER training mask for men and women!
- ?TOP QUALITY & DURABLE: These workout sports masks are made with premium quality, highly durable materials, a combination of medical silicone and breathable elastic straps, guaranteed to withstand the test of time without snapping or breaking mid-workout!
- ?ADJUSTABLE RESISTANCE LEVELS: With an intelligent universal size design which ensures a perfect, snug fit on any face shape, plus no less than 16 different resistance breathing levels, this altitude training mask helps improve lung capacity according to your individual needs, being 100% safe!
- ?MAXIMIZE PERFORMANCE: When your body works harder to breathe, it burns more calories. That
