Bluedot Trading 12 Pair (24 Warmers) Hand Warmers Air Activated 10+ Hours of Heat for Camping, Winter Sports, Emergency Survival Kits! Expiration 9/2021 Each Package contains 2 individually wrapped Hand Warmers Allow up to 20 minutes for warmers to heat up fully Air Activated and Safe to Use Expiration: September, 2021 ~ Printed on packages Provides up to 10+ Hours of Instant, Portable Heat