Mont-bell Geoline Shirt Black EXP. High-Neck Men's #1107714 (M)

Geoline 233g Black (BK) S, M, L, XL Men Designed for use in extremely cold climates, this underwear prioritizes warmth. Despite its thickness, it offers excellent stretch and a comfortable fit. It features a box structure connecting a smooth outer layer with a soft inner layer, separated by partitions. The fluffy air layer traps plenty of dead air (still air acting as insulation), preventing heat loss and achieving high heat retention. The smooth surface and excellent stretch make layering easy. It's a high-neck type with a zipper for added warmth around the neck.