Kragg SL Cotton Bird Word SS MKragg SL Cotton Bird Word SS M in Dk Stratus Fluidity by Arc'teryx is built with 160gsm long staple SUPIMA cotton, which is naturally breathable, durable, and luxuriously soft Continuous seam construction along the back of the neck, shoulders, and sleeves minimizes irritation and improves durability Bird and Wordmark graphic Regular fit patterned for mobility and comfort while climbing.