• Combo made of cooling towel placed in 20 oz. water bottle. • Cooling towel is made of 50% Nylon/50% Polyester, is latex-free, lightweight, soft, breathable. When wet it cools for up to 2 hours, when dry it absorbs sweat. • To activate: 1 - soak towel, 2 - ring out excess water, 3 - snap to activate (to reactivate, re-soak, re-ring and re-snap). • 20 oz. water bottle is made of BPA-free PET with flip-up lid and is USA made.