The Sea To Summit Trek and Travel Liquid Laundry Wash is a biodegradable, super concentrated formula which is safe to use on your clothing when travelling. The liquid laundry wash is stored in a handy leakproof bottle with a tight sealing lid making it safe to pack in your luggage or backpack. What's even better, the laundry wash is PH-neutral which eliminates any weakening of the fibres in your clothing. This bottle is TSA approved as a carry-on., however, do check with your chosen airline before departing. Light green tea fragrance.