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Thickness: medium
TF Card MP3 Music Mode Clear Sound
purple short sleeve
Features:Pure color
Elevation Training Mask Size:M Thickness: mediumProduct information: Fabric: Spandex Lycra Color: black, silver Size information: Size: S, M, L Product features: Using this mask can simulate the state of high altitude training in the plain area. In the high altitude environment, the air is thin, the oxygen content is low, and the blood cannot absorb oxygen normally as usual, so the heartbeat will be accelerated. Training under this ring can strengthen vital capacity, diaphragm, cardiac load
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