Allbirds Trino Sprinter Sock Onyx scores 49/100 on Scout's independent analysis of ingredients, additives, and lab results — a below-average score in Scout's analysis. Allbirds Trino Sprinter Sock Onyx scores 49/100.

Allbirds Trino Sprinter Sock Onyx ranks #14 of 15 workout socks in Scout's independent rankings. The current top score in the category is Darn Tough Women's Vertex No Show Tab Ultra-Light Socks Clover at 75/100.

In Scout's ingredient-by-ingredient analysis, Merino Wool, TENCEL Lyocell count in its favor; Recycled Nylon, Spandex are flagged as ingredients of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.