Extensions are completely safe for the skin, eyes and contact lenses. Lashes will be so light in weight to wear you wont even feel them on. Eyelash extensions are semi-permanent and can last up to as long as you want them too; when looked after. Great for a special occasion, wedding, holiday or just for an ultra feminine look. They are best refilled every 2-3weeks to keep them looking great and natural. Your own lashes have a cycle of 90 days so they will naturally fall out we then replace lashes on new healthy lashes to keep your extensions looking full and luscious.