All outdoor wood furniture will dull, grey and splinter when left outside throughout the year.

It's recommended that you at least bring your outdoor furniture inside for the winter - preferably you would also periodically seal the wood so that it will repel moisture during those unexpected summer rainshowers, same as you would with a wooden deck.

Royal Botania outdoor furniture actually has similar chairs and uses mature teak wood. The difference is that this wood is saturated with oil and thus of better quality: the oil content and fiber strength are at their peak and it does not need to be treated during the winter... www.royalbotania.com/us if you are interested..