At 15 degrees, exposure to cold elements can lead to hypothermia. Bob should wear a winter coat and lined pants, as well as snow gloves to avoid frostbite. A beanie or hoodie to cover the head is a must. A lined fleece neckwarmer to cover the face and neck will be helpful as well. Appropriate shoes/boots that are water resistant.
He should have some emergency supplies in his backpack. These may include an emergency blanket, avalanche kit, tent, and sleeping bag appropriate for 15-degree weather. He should also have non-freezable food items or instead material to start a fire.
If it's 15 degree's Bob should wear one small jacket and a winter coat on top with thick jogging pants gloves a beanie and put both hoods on from the jacket's.
<span>Wear shoes with a BLANK ( my answer is "tread") to prevent slipping on ladder rings or steps. Having a tread on your shoe sole will allow the show to have greater friction with its surface which will lessen the likelihood of slippage.</span>
