I believe a man should always be prepared. Or rather as prepared as possible. I'm always the guy that has the tool people are looking for. When hiking or backpacking out in the wilderness it is therefore vital to have a quality first aid kit. You simply don't know what is going to happen and if you're like my Dad something is always bleeding so make sure you have a first aid kit to patch up yourself and others.
I've been dehydrated and had mild altitude sickness on a backpacking trip and it's not enjoyable. If you have been around the proverbial block then you know it's not wise to stroll up to any old stream and drink the water therein. So if you're going to be out adventuring multiple days and don't want to carry all of your water you're going to need on your back then you'll need something to purify/sanitize your water. I recommend this Katadyn microfilter as it's compact, durable, and most importantly effective.
You're a darn tough guy and you want to put as many miles behind you as time and your body will allow you. So for you you're going to want these Darn Tough Hiker socks which are designed for just that application. They're made primarily of merino wool which is antimicrobial and antibacterial. They're made to help prevent slippage and blisters as well. BUT possibly the coolest feature is that they are unconditionally guranteed for LIFE! So go ahead, try to wear a hole in them... if you can!
Perhaps the most important gear you need when hiking miles in rugged country is a good pair of boots. Boots that are going to give your feet and ankles support, keep them dry, and not destroy your feet with blisters. Some good friends of mine, and avid backpackers swear by Solomon boots for their trips. These particular Solomon boots are their latest and greatest and have nothing but positive reviews. They're pricey but proper footwear is worth the investment!
Heather's Choice is a new backpacking food company that I heard about on my favorite podcast, Gritty Bowmen. Heather's Choice is founded and based in Alaska and specialize is creating healthier food choices for the demands of backpacking and adventuring. They offer a better quality alternative to the Mountain House dehydrated type backpacking meals. Listening to the founder you can tell how passionate she is and how much time and care goes into crafting these meals.
In my estimation, almost as important as sleeping equipment and good boot is a quality rain coat. Something my Dad always taught me is that anytime we were going to be outside for any length of time, I should have my rain coat with me. If you're going to be hiking/backpacking then it pays to have a very high quality rain coat to not only keep you dry but also help you regular your temperature and protect you from all the elements such as sun and wind. I like the fit of Outdoor Research and this jacket is top of the line.