evo.com | Outdoor Research Insulated Jackets > Pack light, stay warm: the Outdoor Research Vesper Insulated Jacket is one of the most versatile insulators in the OR lineup. VerticalX Eco SR insulation delivers stretch and breathability without the bulk, while a wind- and water-resistant shell shrugs off unpredictable alpine weather during high-output days. The left hand pocket doubles as a stuff sack, so this jacket packs down small enough to disappear into your bag until you need it on a shoulder-season summit or a chilly belay. Drawcord Adjustable Hem Ultralight Shell bluesign(R) approved 87% Nylon 13% Spandex 20D Ripstop Stretch Woven 61 G/M2. Insulation VerticalX Eco SR(TM) 55% Repreve(R) Recycled Polyester, 35% Sorona(R), 10% Polyester Insulation 45 G/M2. Exterior Zip Chest Pocket | Outdoor Research Vesper Insulated Jacket Men's 2027 - 2X-Large Blue | Nylon/Spandex/Polyester