UHMW-PE stands for Ultra-High Molecular Weight Polythene.  High Impact Strength - Absorbs impacts - Bounces back to original shape Extremely Quiet Significantly dampens impact noise Self Lubricating/High Abrasion Resistance - Easily slide over rocks and logs - Outwears carbon steel 10:1, great for sand Light-Weight - Lighter than aluminum - Very similar weight to HDPE  (Factory/OEM material)