It's lightweight , stretchy and so comfortable. its a great layer for windy or cool days. Waffle knit fleece interior. - Micro-grid fleece sits off the skin for optimal warmth and moisture management -Stretch material at the hood, hem and arms for easy movement -Two thirds front zip lets you vent or put on/off when wearing a helmet -Fitted hood with elastic trim sits under a helmet -Rotated seams sit away from pressure points Zippered chest pocket fits a phone -Thumb loops keep the sleeves tucked under gloves