Mountain Equipment Windstopper Fleece jacket. So comfortable in a wide range of conditions and long lasting that I bought another second-hand off ebay as they no longer make them.
A single skin pertex cycling jacket that Mountain Warehouse had on sale about six years ago. It is totally windproof and highly breathable yet weighs next to nothing. It has survived a number of unintentional body dabs and even a trip into a gorse bush without damage. All for £16. I use it on the bike, out walking etc. etc. if they still made it I’d buy another like a shot.
Another fan of Scarpa Footwear. All of the various boots and shoes I have had from them fit my foot shape brilliantly and last really well-I have a pair of Manta’s that are coming up for 20 years old that I still use for rough work outside.
Edit:
Almost forgot my MacPac Eclipse tent. I bought it in NZ 20 years ago, used it for the next six months almost every night whilst backpacking round NZ, USA and Canada and then another month in Scotland when I returned to the UK. It only comes out occasionally now, but it is still waterproof and I have never had to repair it.