evo.com | Wild Rye Long Underwear Tops > The Wild Rye Hailey Half-Zip Top is made with 100% merino wool, making it naturally breathable and insulating without much effort at all. In a half zip construction, the Hailey easily transitions from the hill to the apres and lets you vent a little when the stoke gets too hot to handle. Thumbholes Next-To-Skin 230 GSM, 18.5 Micron Cruelty-Free Merino Wool Center Back Length 25" (size S) Breathable and Stink Resistant | Women's Wild Rye Hailey Half-Zip Top 2025 - 4 Purple | Wool/Micron