The Gelert Reusable Gel Handwarmers provide instant warmth during winter hikes, ski trips, or chilly commutes. These reliable warmers deliver comforting heat when you need it most, making cold-weather activities more enjoyable without the waste of disposable options. Product Highlights: Reusable design: Ready for multiple uses Fast 53C heat: Warming in seconds Compact size: Fits perfectly in pockets Pack included: 2 Packs Size: 9cm(L) x 6cm(W) Material: Environmentally safe, biodegradable contents User Guide : To ‘reset’ the crystallised pad to its original gel form, add the handwarmers to a pan of boiling water and allow to simmer until the crystals have completely dissolved. Allow to cool totally before handling. Cautions: Discard if broken, Liquid may cause skin irritation Keep away from fire!