The Grabber Warmers MEGA Warmers offer long-lasting warmth for up to 18 hours with each air-activated warmer. This box of 30 warmers is perfect for outdoor activities such as skiing, snowboarding, and snowshoeing, providing relief and comfort during cold weather conditions. With an expiration date of 02/01/2029, these body warmers from Grabber are a reliable and convenient solution for staying cozy on the slopes or during winter adventures.