When you sleep on your back, your tongue falls backwards into your throat which can narrow your airway and partly block airflow.
仰睡会让舌头滑落到咽喉部位，减小了呼吸道的面积，一定程度上阻塞了空气流通。
Airflow channels on back panel provide ventilation so your back remains cool and dry during your trek.
背面板的气流通道，提供通风，使背部保持凉爽，干燥，在您的长途跋涉。
Airflow channels on back panel provide ventilation so your back remains cool and dry during your trek.
背面板的气流通道，提供通风，使背部保持凉爽，干燥，在您的长途跋涉。
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