LE SONNET Two-way Jumper - BlueberryTwo way Jumper Blueberry Product Information: This is an outerwear that can be used as both a jumper and a vest. We used 3M Thinsulate filling, which reduces the volume by half and increases thermal insulation. We gave extra space to the armhole area connected by a zipper to reduce discomfort when swinging. I added pleats to the sleeves to make it look slimmer. It is a material that is waterproof and has high usability. You can use it as a vest by