What Our Gearhead(R) Experts Are Saying:"The ThermoBall Vest is my go-to layer for shoulder seasons and active pursuits. It's warm enough to fend off brisk mornings and works perfectly as a midlayer under a jacket on colder days. The synthetic insulation performs well, even when it's damp, and I love that it's made from recycled materials."When chilly mornings greet us or evening breezes linger on mountain ridgelines, we reach for the ThermoBall Vest. With synthetic ThermoBall(TM) insulation that holds warmth even in damp conditions, it's a versatile piece we rely on from trailhead to town. Its lightweight, low-bulk design keeps us agile on the move, while the recycled WindWall(TM) shell stands up to blustery gusts and unexpected weather. Layered over a flannel on mild days or under a shell in harsh conditions, the ThermoBall Vest packs small and packs a punch, ensuring we're always ready for what's next.