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AMAZON'S #1 RATED BREATHING FITNESS EXERCISER. "USED BY NAVY SEALS" - THE BEST 7 MINUTE EXERCISE TO BOOST YOUR RESPIRATORY SYSTEM FOR ALL ENDURANCE SPORTS & COPD PATIENTS. - FEATURED IN THE FOLLOWING MAGAZINES: "RUNNER'S WORLD", "TRIATHLETE","TRIATHLON CANADA", "AUSTRALIAN TRIATHLON & MULTISPORTS","VELONEWS", "INTERNATIONAL FREEDVING", "SKIN DIVER", "HAWAII SKIN DIVER" "FREE SURF HAWAII", & "THE BOX (CROSSFIT").THE MOST COMPACT (4") / PORTABLE / POCKET SIZE / RUST PROOF BREATHING FITNESS EXERCISER. (TAKE IT ANYWHERE & USE IT ANYWHERE)
RATED #1 BY THE L.A.TIMES REVIEW FOR SUPERIOR QUALITY, BEST DESIGN AND EASIEST TO USE - (100% INSPIRATORY/EXPIRATORY ADJUSTABLE RESISTANCE AIR-FLOW VALVE & FLEXIBLE MEDICAL GRADE COMFORTABLE SILICONE MOUTHPIECE).
RANKED #1 ABOVE ALL OTHER BREATHING EXERCISERS AND ELEVATION TRAINING MASKS. ALSO USED BY COPD PATIENTS!
BUY DIRECT FROM THE MANUFACTURER!!! - MADE IN U.S.A. (INCLUDES FREE SHIPPING + 5 YR. FULL WARRANTY + 100% MONEY BACK GUARANTEE IF RETURNED WITHIN 60 DAYS)