With the travel friendly Footwear Protector Flight you can be sure of water-tight, breathable shoes no matter where you’re heading. This water-based, biodegradable liquid repellent makes kicks water-tight and totally breathable. It’s safer for you, your shoes and the planet. That’s what we call a triple threat. It’s even safe to spray inside. "With the travel friendly Footwear Protector Flight you can be sure of water-tight, breathable shoes no matter where you’re heading. This water-based, biodegradable liquid repellent makes kicks water-tight and totally breathable. It’s safer for you, your shoes and the planet. That’s what we call a triple threat. It’s even safe to spray inside