About Hydrapak Wooly Mammoth Insulated Water Bottle - 25 oz
Hydrapak's Wolly Mammoth Insulated Water Bottle uses a double-wall construction with insulation in the middle to produce a high-tech water bottle that keeps your liquid cool. Technically speaking, the walls are constructed of Resilium with PrimaLoft insulator in between to ensure this is one sports bottle that keeps its cool.