Voyager PEKEV Men's Motorcycle Jeans. .  I believe these have the longest rated slide time of any jean. 

These are a regular look jean with hip and knee protection. 

I wore these a handful of times and they are still in excellent condition. Current RRP £285. 

The official blurb from a current retailer. 

• Made with PEKEV® the world’s toughest Polymer based material, exceptionally strong protection against abrasion, motion cuts and road impact.
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• One of the very few CE EN13595-level 2 certified garments, with world’s highest abrasion rating for motorcycle jeans at 10.83 seconds.
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• Highest quality 13-oz denim in high fashion style and finish. Straight cut, but not too narrow to fit over your boots.
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• Comfort stretch, fully lined with super abrasion resistant PEKEV® from top of waist band to bottom leg seam. 100% coverage for 100% protection.
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• Stitched with additional soft inner mesh lining for dispersing body heat and unsurpassed comfort. Super soft material which feels like 100% denim.
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• Hip and knee armour pockets with adjustment.