Review on 🏋️ NS NESIAN SPORTS Hex (Hypoxic Exercise) Mask - Elevate Performance with Altitude Breathing Simulation - Dark Gray by Kenneth Bryan

I like it. Yes, there was a small problem. The front panel tends to fall off. After informing the company, a replacement was quickly sent to me. I love the fact that it has different breath levels that you can set. It helps increase my endurance while running. I use the mask mainly during karate training. It's easy to clean and has a storage bag to hang on my duffel bag. It takes some getting used to if you've never used a training mask before. I would recommend otherwise based on the company's prompt response for a free replacement of my mask. Also, the fabric is great and stays on throughout use.