Large, transparent, rectangle (2 & 4 ct), individually wrapped With penetrating lidocaine for targeted pain relief for muscles and joints including shoulders, knees and lower back Stay on for up to 12 hours to help temporarily relieve muscle and joint pain Designed with specialized adhesion technology are ideal for lower back pain Unscented patches formulated with 4% maximum OTC strength lidocaine for pain relief without a prescription Do not contain acetaminophen Pack these topical pain reliever patches in your gym bag, hiking pack, or suitcase to help tackle pain wherever it strikes