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RESTORE UNRIVALLED WATER REPELLENCY (DWR) &BREATHABILITY - Rated best in independent testing for both cleaning & re-proofing waterproof clothing to restore breathability and water repellency, formulated for GORE-TEX, Sympatex, Pertex and other membraned garments. SUPER CONCENTRATED SOLUTION - More treatments per bottle, treat more garments than ever before. ONLY ONE WASH CYCLE - Clean and re-proof using only one wash cycle, no need to clean and re-proof using two separate washes, save time, water and energy by partnering STORM Apparel Proofer with STORM Apparel Wash, simply add STORM Apparel Wash to the detergent compartment & STORM Apparel Proofer to the conditioning compartment. Safe to use on both machine washing and hand washing. PATENTED DWR ABRASION RESISTANCE - STORM Apparel Proofer is a heat activated solution offering incredible abrasion resistance. If you are looking for an air-curing solution try STORM Apparel & Down Proofer Spray Air Cure. FREE FROM FOREVER CHEMICALS - STORM has offered PFC, PFAS and PFOA free waterproofing solutions since formation in 2002. All made in Derbyshire UK. Bluesign Approved. SUPPORTED BY LEADING GLOBAL BRANDS - Supported for both performance and mindful chemistry properties, STORM is supported and stocked by leading global brands including: Patagonia, Arc'teryx, Craghoppers, Finisterre, Regatta & more. SUSTAINABLE MATERIALS - STORM use 100% recycled aluminium bottles which are infinitely recyclable, and outer kraft card packaging. Carry on the mission and recycle STORM bottles again and again.