... . Provide up to 4-8 hours heating time ! .5. Glove lining made of polyester, Glove shell made of Leather, PU, Nylon, waterproof & Windproof ... Size: S, M, L, XL8. Lithium Battery absolutely stable, safe ! Glove Sizing Chart*SmallMediumLargeXLargeLadies6-1/2cm7cm7-1/2cm Mens8cm8-1/2cm9cm9 ...