WATERFLY Crossbody Sling Backpack: Unisex Adult One Size Travel Hiking Buy WATERFLY Sling Bag Crossbody Backpack: Over Shoulder Daypack Casual Cute Waterproof Sling Backpack for Women & Men Lightweight Crossbody XB Waterproof Crossbody Sling Backpack Ideal for Men, Women, Travel. This Rabock Waterproof Sling Backpack is the perfect blend of style and practicality. with a sleek design. plenty of room for storage. and adjustable straps for maximum comfort. Made with lightweight and waterproof material. it offers reliable protection and includes multiple pockets for easy organization. Enjoy a bag that looks great and stands up to everyday use. Inspirations: Rabock. Cyberpunk. Streetwear. Futuristic. Available In Black. Gray. Camo. Premium materials: Oxford and polyester.