The Errant Thermal Insert fits perfectly into the Errant Pack’s wet/dry compartment. It uses Boundary’s ThermaGrid fabric to keep your food or drinks hot or cold for up to 8–10 hours. A water-resistant YKK AquaGuard® zipper keeps everything secure. Specs Dimensions: 9.5W x 6H x 6D" Capacity: 3 L Weight: 0.2 lbs. / 0.1 kg Features ThermaGrid fabric keeps contents hot or cold for hours. Mesh exterior pocket for quick-access items. YKK AquaGuard® zipper seals out moisture. Top zipper pocket for snacks or utensils. Can be worn with an ACC Strap (sold separately). Shipping + Returns Enjoy free 2-day express shipping on U.S. orders $100+ and fast international shipping on orders $400+. Learn more . 30-day return policy .