After using the pain patch for a while ====== I noticed a slight increase in temperature at the patch site and the muscles were more relaxed. These patches effectively penetrate deep into the localized muscle and provide relief for up to 12 hours. Patches ====== Our patches for shoulder, neck, lower back and leg pain relief offer the ideal solution. Safe and Comfortable ====== Breathable non-woven fabric will not cause discomfort due to heat accumulation when applied to the body. How to use ====== Just wash the affected area with warm water, peel off the protective film, and stick the self-adhesive bandage on the painful area. Applicable people ====== Suitable for drivers, office workers who sit for a long time, and the elderly with back pain.