Patagonia's most technical core warmer comes in an improved, even more versatile fabric. The new Men's R2 Vest is designed in variable-knit polyester (7.4-oz Polartec Thermal Pro that's 40% recycled) to enhance compressibility, breathability, and moisture-management. With R1 stretch panels along the torso, backs of armholes and collar, this low-bulk warming insulation really shins when worn under a shell. The R2 Vest is recyclable through the Common Threads Recycling Program.

Price: $119