Rust-Oleum® Shield H2O™ Fabric Water Repelling Treatment
Amazon.com: Scotchgard Fabric Water Shield, Water Repellent Spray for Spring and Summer Clothing and Household Upholstery Items, Long-Lasting Protection for Seasonal Fabric, Two 10 oz Cans : Health & Household
How to Waterproof your fabric : 5 ways that will help it to resist water - SewGuide