Icebreaker's midweight, long-sleeve baselayer that's ideal for cold conditions, the Apex Long Sleeve Crewe is a highly breathable foundation for any winter layering system. Made with Icebreaker's 260-gram weight, 100% Merino fabric, the Apex Long Sleeve Crewe cuts the chill on frigid ski tours & shoulder-season hikes, & offers natural odour resistance on high-output days & extended travels. Forward side seams & offset shoulder seams prevent irritation while wearing a backpack, & a secure zipped sleeve pocket keeps your ID, lip balm & other small essentials secure.