* Polartec Grid Fleece
* High Warmth to Weight Ratio
* Breathable and Moisture Wicking
2017 K2 Long Sleeve Shirt
The IR Long Sleeve K2 Shirt is a loose, technical layer that fits like a t-shirt and has become the new favorite layering piece at IR. It’s made with a 7 oz Polaretec PowerGrid polyester single-sided fleece with waffle grid texture on the inside. The fabric is only slightly heavier than a t-shirt, but offers truly surprising warmth for such a light and supple fabric.