The easy to use, safe, high performance, wash in waterproofing for all our hammocks. With Nikwax Cotton Proof, you can waterproof any of our hammocks (cotton, silk, canvas, polycotton) with this wash-in waterproofing. You can use it in a washing machine or by hand-washing, which is useful as many of our hammocks are hand-wash only.PLEASE NOTE: This treatment does not make your hammock water-resistant. Water will bead off the hammock once treated, but if you leave it outside for a prolonged period of wet weather, eventually the water will penetrate the fabric Easy to apply - wash-in, brush-on or spray-on Treated items dry remarkably fast Lasts several washes Prolongs the life of your hammock Leave your hammock outdoors for longer PROPERTIES:- No Propellant Gases- Non-Persistent- Fluorocarbon Free- Environmentally Safe- Not Tested on Animals