Made with brrr°® Pro fabric, which features advanced wicking technology for all-day cooling comfort and antimicrobial properties to prevent odors. Thumbholes extend sun protection to the tops of your hands. Watch ports keep you on (river) time, without exposing skin. Seam placement avoids high-friction zones, enhancing athletic performance. Regular fit for casual comfort whether worn alone, under a PFD or as a base layer for technical outerwear. Slightly dropped rear hem provides additional coverage. Features a small loop and plastic button for securing the hood around the face. Provides UPF 50+ sun protection.