When dressing for an all-day hunt, getting the layering right is crucial. Like the pant, Vycah&&';;s Pyrex Shirt is THE essential upper body layering piece for any serious hunter. Featuring 4-way stretch polyester construction; this piece moves with you. Highly breathable and moisture wicking, the Pyrex will keep you in the stand longer on those all-day mid-season hunts. Polyester/Spandex Blend 4-Way Stretch Polyester Highly Breathable, Moisture Wicking Fabric Flat-Lock Seams Mid-Season Base Layer