Some walkers are sold on all-leather walking boots, and the Delta GTX Activ is a prime example of the genre. Scarpa itself makes many mentions of the 'out the box' comfort and level of support it affords for the eager user too. If you regularly walk on rugged terrain and want footwear for all but technical winter ground, it could be an ideal choice.
At 760g per boot the Delta sidesteps an accusation typically levelled at leather options: that they are heavier and more cumbersome than their synthetic cousins. This is not the case, and it's apparent how light and nimble the Delta feels (for a solid three-season boot) the first time you try it on, and on every walk after.
Their construction is a very smooth and attractive calf leather, and they come with a Gore-Tex lining within. We've been fortunate to have used this boot in various forms since 2011 and we've found it to be infallible on the weather-protection front. Combine that with the range of foam inserts, the soft-yet-supporting ankle cuff and tongue, and the superbly judged form of the 'BD' last used by Scarpa and you've got a real winner of a boot on your hands (or, ideally, feet).
The Vibram Biometric outsole has proved extremely capable on everything from soggy grass slopes to 4,000m scree-riven summits, while the smaller details such as the lacing system are spot on too. The rand extends solely around the toe, but we've found the durable leather construction to provide ample all-round protection despite this.
Keeping them looking new and performing at their best will mean using a leather treatment after every wash, but it's a small price to pay for the comfort they afford in return.
In conclusion: A supreme three-season boot that we're struggling to fault. They achieve the highest ratings for performance and comfort and should be a serious consideration for any mountain walker in the market for new footwear.