One stretch of Buff material, and another of Polartec fleece - perfect for cold days! Fun fact: One Buff Polar contains the plastic from three recycled water bottles. - One end is made of traditional, thin Buff material, with 97% recycled polyester and 3% elastane - The other end is made of warm, soft PrimaLoft Eco fleece, a biodegradeable material - One size for adults - Machine wash at 40ºC - Made in Barcelona, Spain The factory has an ISO14001 environmental certificate, as well as an SGE-21 certificate for social and ethical responsibility. The electricity used in production is made with renewable sources.