The Nils Robin Under Top is an ultra warm, heavyweight 1/4 zip that effectively keeps you warm on days when the temps really start to drop. The long sleeve t-neck design is constructed with 4-way stretch fabric that follows your every move for unmatched comfort and a fleece-backed interior provides extra warmth. Suitable for high-activity levels, this top layer has natural wicking properties that keep you warm and dry so you can be outside all day long. 85% Nylon/15% Spandex, Fleece backed - Interior brushed fleece keeps you warm and cozy., T-Neck Design - Provides extra protection from cold air., Natural Wicking Properties - Pulls moisture away from the skin and helps regulate body temperature., 4-Way Stretch - Ensures superior flexibility and movement., Fit: Tight, Warranty: Three Year, Material: Synthetic, Weight: Heavy, Type: Top, Wicking Properties: Yes, Water Resistant: No, Recommended Use: Snow, Moisture Wicking: Yes, Model Year: 2022, Product ID: 541965, Model Number: 8206 10 S, GTIN: 0659081605477