It is selling at USD 85 (HKD 663)
https://www.amazon.com.au/PajamaJeans-Straight-Denim-Jeans-Vintage/dp/B00RYCAYT4
Comfy, Relaxed Fit - Made with our exclusive Dormisoft® Denim fabric that feels like your favorite pair of sweats but looks like super-stylish jeans
Essential Vintage Wash - Features that classic worn-in denim look with subtle fading and whiskering at the thighs for work-to-adventure wear
Pull-On Waist - Ditch those uncomfortable old jeans in favor of PajamaJeans for men featuring a pull-on drawstring waist and a faux fly for the comfiest jeans ever
Designer Details - Stylish men's style finished with five-pocket designer detailing, contrast stitching and antiqued brass rivets for a designer look at an amazing price
Fits Like a Glove - Provides a perfect fit thanks to the stretch waist and Dormisoft® construction; A huge variety of sizes available