Grand Canyon Rafting Half Day & One Day Trips Clothing Upper Body Rain Jacket – with wrist, neck or hood neoprene enclosures to keep water out recommended T-shirts – Cotton – to wet and keep cool during side canyon hikes T-shirts – Quick Dry/Polyester blend to wick sweat when wanting to stay dry Long sleeve lightweight shirts (sun protection & extra warmth) Clothing Lower Body Rain Pants – with neoprene enclosure at ankles and waist to keep water out recommended Long, lightweight pants (sun protection extra warmth) Nylon shorts – any quick drying fabric Swimsuit (2 piece for women works best – synthetic board shorts for men)