... shape 3. OEM 4.Medical use Hot/Cold Pack Usage: Cold compress: put the cold/hot bag into freezer to be refrigerated for ... therapy for traumatic hemorrhage, heatstroke, itch, headache, strain, scald, fatigue. Hot compress:alleviate rheumatic pain, neural pain, sciatica, vertebral pain, improve ... -18°C condition, and can be repeatedly used alternately for hot and for cold. Hot/Cold Pack