allbirds NWT 💞 Natural Run Mid Layer 1/4 zip top $98 Retail in Green Hush Merino Wool PTP: 20" Length: 23" Warm up your cold-weather runs with a layer of super-soft merino wool designed to keep you warm and comfy mile after mile. Best For: Outdoor runs, walks, workouts Materials:48% TENCEL™ Lyocell, 30% Recycled Nylon, 18% ZQ Merino Wool, 9% Elastane Quick-drying Tencel™ fabric keeps you cozy even after breaking a sweat Fit: Enough stretch for full range of motion Warm and lightweight See photos for measurements