Purchased the 'Discovery Waterproof Isogrip Boots' for over £110 in August 18 - these come with a 5000 mile outersole guarantee. I've worn them approx 8/10 times in 17 months, covering no more than 250/300 miles,however, recently the lace rivets have started breaking, leaving me unable to tie them up. Spoke to Mountain Warehouse, and as its been over 12 months and it's not the outersole that's broken, they will not assist. Subsequently, they could offer an outersole guarantee of a million miles, but if anything else goes, they're not interested. Would not recommend as it's appealing quality and certainly not reliable.