Onsen Supima Waffle Bath Robe Denim Size Medium New Luxurious Onsen Supima Waffle Bath Robe in Denim size Medium. Made from 100% American-grown Supima cotton, this robe features Onsen's signature waffle texture for quick-drying softness and breathability. The design includes a hood, self-tie belt, and deep front pockets for ultimate comfort. Includes original Onsen cotton storage bag (shown in photos). Item is brand new and unused. Size Medium size chart in photos.