We built the merinos to be the foundation and next to skin layers of your XKG hunting system. Construction consists of 17.5 micron 90% Merino wool/ 10% Nylon 150 weight fabric, this piece functions in any conditions - keeping you cool in the heat with its breathability and warm in the cold with its tightly sewn fine wool fibers. The XKG Foundation Merino 150 Hoodie is assembled with a no-itch flatlock seam construction and crossover sun hood. Its material is ultra-breathable, and moisture-wicking. With its natural fibers, it's also excellent at controlling odor. It outperforms other fabrics after several days in the field by repelling odor causing tendencies to keep you concealed. Paired with the Foundation Bottoms, the Merino Foundation pieces complete the base layer for the XKG Series. 17.5 Micron 150 Gram 90/10 Merino Wool/Nylon Blend Flatlock Stitched Seams Natural Odor Control Ultra Breathable No Itch Comfort Excellent Warmth to Weight Ratio Crossover Sun Hood Product Weighs: 7.4 oz.