Made with Menthol Crystals (Mentha arvensis) 100% Pure & Natural and are extracted from 100% mint leaves using steam distillation followed by a gentle freezing process.
Mixed at 20% this menthol is stronger than most, available in 10ml to 100ml, mixed with Pharmaceutical Propylene Glycol 
Please use sparingly 1% to 2.5% is normal to crystalize just give warm bath