Arc'teryx Rho AR Balaclava 4" high 9" wide RHO AR BALACLAVA - Full face balaclava with a unique ergonomic design that fits comfortably over the head, with a face opening that fits over the nose during cold weather endeavours. ALL ROUND - High performance weather protection and materials, emphasizing versatility for multiple activities. ALPINISM & CLIMBING - Climbing equipment designed for efficient movement and protection in alpine environments POLARTEC - Synthetic fleece textiles with stretch, warmth and air permeable properties. Offers durability. RHO - Thermally efficient base layer with excellent moisture management properties. Has stretch comfort.