The Mountain Hardwear Men’s Kor Strata Vest is an insulated vest for spring hikes. Winter fades and spring comes in, and this shoulder season you’re really itching to get on the trail. Throw on the warmth of PrimaLoft Gold Active insulation and get out there then. Base layer first, then this toasty warmer for your core. Hardshell optional. Alone or with additional layers, the vest leaves arms free for movement while also stretching, so your center won’t be restricted.