O'Neill Thermo-X Long Sleeve Crew top provides maximum insulation with minimal bulk, making it an ideal base layer for cold water activities. Constructed with a blend of polyester and spandex, this performance top features a 4-way stretch fabric that ensures full range of motion while the water-repellent finish helps keep you dry. The raglan sleeves and flatlock seams prevent chafing, and the integrated thumb loops keep sleeves securely in place under a wetsuit. Designed for high-performance warmth, it is perfect for surfing, diving, or any aquatic sport requiring extra thermal protection. Brand new without tags, never used. Measurements: • Chest: 18" (36" doubled) • Length: 25" • Sleeve: 18" (underarm to cuff)