Onsen: May 23 to May 29 Memorial Day Weekend Sale – Up to 40% off sitewide! America’s #1 Waffle Towel: An Onsen (温泉) is a Japanese hot spring and the bathing facilities and inns frequently situated around them. Our towels are made from 100% American-grown Supima cotton. Supima® cotton is a 100% USA-grown cotton with an extra-long staple fiber, making it one of the finest cottons in the world; which means our towels are high quality, luxurious, and built to last. Lightweight & storage friendly—about 30% lighter & 50% less bulky than terry towels. Check out our waffle-weave towels and bath robes in a variety of colors!