Lululemon Keep The Heat Thermal Long Sleeve in Iron Blue Excellent condition- no stains or flaws size small blue color Keep warm during intense cold-weather activities. This slim-fitting high-performance layer is sweat-wicking on the inside and insulating on the outside. senseknit™ technology Using SenseKnit™ technology, varying levels of breathability are knit seamlessly into the fabric breathable minimal seams for a smooth fit wool-blend Wool-blend fabric dries quickly and helps regulate temperature. Dries quickly features Designed for: Training Zoned compression: Ribbed textures are mapped over powerhouse muscles for a supportive feel Fit: Hip length