? By simulating high altitude training, 'Vikingstrength Fitness Mask Pro' increases your anaerobic threshold, it gives you better lung capacity and better stamina.
? The 4-level resistance system make this mask ideal for all users. It allows you to choose from 3000 Feet - 15000 Feet without having to take off your mask.
? High quality materials makes this mask ultra light and comfortable to use, that will not slip during training
? Easy to disassemble, clean and wash

Technical Details

Product Details

Package Dimensions
Width : 5.12 inch
Height : 3.54 inch
Length : 5.51 inch

Shipping Weight: 4.64 ounce (View shipping rates and policies)

ASIN : B072NK418K

Product Description

Vikingstrength Fitness mask Pro