Instant heat and reusable: 155 gm / 5.5 ounces of heat - 13 x 19 cm / 3 x 5 inch size;Click the disc and heat packs heat up in under 20 seconds;Lasts up to several hours under clothing or fabric;Reusable 500 times and more; Premium Quality; Medical Grade - Made in USA - not China;Eco-Friendly - reusable - never has to be disposed

• Heat Wave Instant Reusable Heat Pack HAND WARMERS - 4 pack = 2 pairs Heat Wave - Premium Quality - Medical Grade - MADE IN USA (not China)

Heat Wave Instant Reusable Heat Pack HAND WARMERS - 4 pack = 2 pairs Heat Wave - Premium Quality - Medical Grade - MADE IN USA (not China)Heat Wave Heat Packs from Bent Grass Concepts