The Lavacore polytherm shirt is designed for superior protection against wind chill and surface splash, making it perfect for a variety of outdoor activities. Its flexible, durable, and water-resistant outer layer is paired with a windproof, breathable middle layer and a warm, moisture-wicking fleece inner layer. The garment features thumb loops, extended back material to prevent ride-up, and a full gusset in the underarm for added mobility. Lightweight, with 4-way stretch and UPF 50+ protection, it offers comfort and performance in all conditions while being neutrally buoyant.