Leather Works 303 Pony Express Short Leather Throw Over Saddlebags The 303 Pony Express Saddlebags were designed in the 1970's to replicate the Pony Express mail bags of the 1800's and are constructed from 10oz American leather that is reinforced with ABS plastic so they hold their shape and won't sag. Features: Ultra-high quality 10oz American leather construction Hand riveted and stitched with industrial strength nylon Water resistant treatment applied to leather Universal throw-over design Bags mount to an under-seat yoke with zip-off connections