Ans: It totally depends on the complexity of your canyoneering trip and your expertise. Some equipment can be bought second-hand like, a swimsuit, shoes, and bags, but others are mandatory to purchase brand new. Here, are a list of some essential belongings that can be carried for a canyoneering trip as a beginner… A fully functional, waterproof, water submerge backpack. Shoes (Canyoning) Harness (Canyoning) Of course a safety helmet  Abseil devise with locking scewgate carabiner.  (1) Climbing Belay device for beginners (2) I personally use Petzl Pirana (recommended for trained canyons) Cowstail with two locking carabiner Wetsuit Dry waterproof backpack Whistle (sound funny but it is useful to contact others in loud noisy surroundings). At least two large carabiners (locking) First Aid Kit