The Mares Rashguard Short Sleeve for men offers excellent UV protection with a UPF 30+ rating, making it ideal for snorkeling, immersion, and as an undersuit. Constructed from a blend of 85% polyester and 15% spandex, its sleek Trilastic fabric ensures easy layering under wetsuits. Flatlock stitched seams prevent skin irritation, providing comfort during extended wear. This rashguard can be worn alone for protection against sun exposure and marine irritants or beneath exposure suits for added warmth and ease of dressing, making it a versatile choice for water activities.