Waffle grid fleece. It's what sets this Outdoor Research Trail Mix Shirt Jacket apart from other fleece. ActiveTemp thermoregulating polymer treatment creates your own microclimate. It keeps you warm when it's cool and prevents you from overheating as you warm up. It also wicks away moisture relative to your level of activity, making this Shirt Jacket ideal for anything from a walk around town to hiking up the hillside. Plus, it feels soft and cozy whether worn on its own or as a layer. And the technology is food-grade safe, bluesign approved, and effective even after dozens of washings. 100% polyester waffle grid fleece has a soft pile feel and is also breathable ActiveTemp thermoregulating technology creates an adaptable level of warmth through all levels of activity Material is also moisture wicking and fast drying UPF 30 sun protection against harmful UV rays Woven zendo fabric interior yoke Spread collar Button cuffs and front bluesign approved for sustainable awareness Order today!