With Phasic™ AR II fabric and next to skin soft 150gsm merino wool Arc'teryx Rho Hybrid Men's 3/4 Bottom not only combines the best of synthetic and natural fabrics to give you an outstanding baselayer, but Arc’teryx cuts these to sit above the boot cuff. Snowboard, ski, mountaineering boots, none of these benefit from having excess fabric bunched up inside the cuff. By cutting these at the calf to mesh with your ski socks these provide insulation where you need it, without the bulk where you don’t. Merrow stitch seam construction further reduces bulk and the opportunity for chaffing. Stretch, moisture management, odor resistance, it’s a baselayer built for movement and winter sports so you stay comfortable out there in the cold. The next to skin layer for all your tall boot sports where packing extra fabric in around your ankles is going to chafe and change the precision fit of the boot.