; The Kyanite Vest gets more out of your layering system with high stretch, lightweight wear, and high insulation from technical Polartec fleece. ; Trim Fit is a motion-friendly fit with reduced fabric for minimal bulk. ; Polartec Power Stretch Pro shell: • Polartec fleece features a brushed back for warmth retention. • Four-way stretch for full range of motion. • Nylon fibers improve abrasion resistance. • Moisture-wicking performance moves perspiration away from the skin to distribute evenly across the fabric surface. • 7.1 oz/yd² / 241 g/m². ; Stretch Tanica fabric with soft, brushed finish trims the collar, cuffs, and hem. ; Stand collar with zipper garage. ; Full-length front zip with No Slip Zip that prevents the main zip from opening on its own. ; Sleeveless. ; Zip hand pockets with breathable mesh pocket bags. ; Curved roptail hemline. ; BIRD logo hit at the left chest. ; 53% polyester, 38% nylon, 9% elastane. ; Machine wash and hang dry. ; Imported. Measurements: ; Length: 25 in ; Product measurements were taken using size SM. Please note that measurements may vary by size.