Fitness Equipment Silicone Breathing Mouthpiece Breath Expiratory Exercise Device Outdoor

Label:Yes color: black application: running, cycling, swimming product size: 5*10*3cm(1.97*3.94*1.18in) package include:1 x lung fitness trainer material: silicone+abs

note: due to the different monitor and light effect, the actual color of the item might be slightly different from the color shown on the pictures. thank you! please allow 1-3cm(0.39-1.18in) measuring deviation due to manual measurement.