Wireless Indoor Outdoor Speakers

What kind of outdoor speakers do you recommend? Last summer my family finished a backyard landscaping project and now, to finish it off, we are looking for outdoor (wireless and weatherproof) speakers. We found some wireless rock speakers that seemed perfect but turns out they are on backorder and we may never actually get them. We liked the outdoor Bose speakers but found out they only work with the indoor sound system and getting both is far beyond outside of our budget! We want something that works with an ipod, sounds great, and will last! Thanks =D