Feature●Compact Lung / Breathing Exerciser●Athletes who want to boost their performance or those who suffer from breathlessness can all benefit●Adjust Strength from Beginners to Advanced With touch of a button●Laytex free●CE markedDescriptionclass="celwidget" data-feature-name="aplus" data-csa-c-type="widget" data-csa-c-content-id="aplus" data-csa-c-slot-id="aplus_feature_div" data-csa-c-asin="" data-csa-c-is-in-initial-active-row="false" data-csa-c-id="q0t5cm-61dv3k-inl2cw-ams9g" data-cel-widget="aplus_feature_div">