Octa underwear set (top and bottom). I'm selling these because I rarely wore them. [Karrimor] thermal crew Description: Lightweight mid-layer for year-round use. Uses Octa®, a hollow fiber with 8 protrusions, which is half the weight of regular polyester fibers. It has high elasticity and easily traps dead air, providing excellent heat retention, quick-drying properties, and antibacterial and deodorizing treatment. Versatile as an active layer in various situations. Weight: 190g. Polygiene StayFresh™ throughout. [Foxfire] TS EX HEAT Spats Men's Description: These inner spats use "Octa CPCP," a special tricot fabric with a hollow structure and 8-lobed cross-section, offering excellent heat retention, breathability, and lightness. To enhance the fit and heat retention, TS EX stretch material with excellent stretch is used as a hybrid on the sides, inseam, and ankles. Anti-static specifications with sewn-in discharge tape prevent unpleasant static electricity. ■Weight: 130g #ultralight