Chrome vanadium steel

lockable 2-way zipper

yet it offers the exact same rebound and damping performance as previous designs

5" to 22" (17 cm to 56 cm)

velcro tab cuffs and bungie adjust hem

HotPoc - Reusable Body Warmers - Two Pack past type tag-Helmets - Cleaners & Treatments Chrome vanadium steelRegular packs are sized to dimensions of 8 cm x 9 cm and have a mass of 60 g per unit. They generate lasting heat up to 30 minutes. They are best for use on the feet or hands! XL packs are sized to dimensions of 10 cm x 15 cm and have a mass of 230 g per unit. They generate lasting heat up to 60 minutes. They are best for general body use. Click on the disk to release heat. Peak temperature varies between 50 and 57 C. Lifespan of over 100 uses.