They provide all the professional gear, from thermal layers, to neoprene suits, to the waterproof jackets. All you need to wear are shoes or slippers and undies, and they have a changing room to put on all your gear. We've done tandem lake kayak before but this sea kayaking was funner with the waves. It took awhile to get used to the steering but it was manageable for us beginners. We even connected (by holding onto our 6 kayaks), set up a sail, and let the winds sail us back to shore! Our guide said this was his first time doing that in Milford since it's not always that windy (unlike at Doubtful Sound), but it was an awesome and unique experience. Highly recommended for a unique perspective from the water, rather than just on a scenic cruise. Others in our group even jumped into the lake for a dip after the kayak tour!