If you favour the fit, reliability and easy-vent warmth of a half-zip fleece, Rab’s lightweight Filament Pull-On is a fast-wicking technical mid-layer that is purpose-built for active mountain use.The Filament Pull-On is built from the latest recycled Thermic fabric - a stripe-patterned technical polyester fleece with unrestricted movement when climbing, trekking and skiing. The fabric is also inherently hydrophobic, enabling it to retain its thermal efficiency in wet conditions, while shifting moisture rapidly through the layers and away from the body. Soft, lightweight and breathable, it comes with a half-length zip, an elevated collar and discreet thumb loops to keep the sleeves secure and draught-free when you up the pace. It also features a secure YKK zipped chest pocket and smooth flatlock seams for increased comfort.