Going for another day of rock before ice tools replace finger jams typically means one thing: teeth-chattering wind and cold. In addition to a heat pack in your chalk bag, bring the new Lightweight R4 Vest. A stretchy Polartec\\" Wind bloc\\" barrier sand- wiched between a durable, lightweight microfleece face and an R1\\" interior provides the optimal combination of warmth and mobility. Strategically placed R1 panels enhance breathability and next-to- skin comfort. The contoured fit works well under a shell when you switch to ice or full conditions roll in. Made in USA.