allbirds Women's Natural Bike Short Break a sweat, not the planet with these buttery-soft, midweight bike shorts. Made with a mix of sustainable materials like eucalyptus tree fiber and merino wool, they wick moisture, dry quickly and keep you cool for every squat, stretch, and stride. Product Features Use: Running, training, walking Material: 43% Tencel™ Lyocell, 30% Recycled Nylon, 18% ZQ Merino Wool, 9% Elastane Mid-rise, mid-thigh length 7” inch inseam Compressive, midweight fabric Sustainability: Run Bike Shorts has a carbon footprint of 8.44 kg CO2e.